PRIME MEDICAL SERVICES INC /TX/
S-3/A, 1998-03-19
MISC HEALTH & ALLIED SERVICES, NEC
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    As filed with the Securities and Exchange Commission on March 19, 1998
                           Registration No. 333-47621





                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                               ..................
                               AMENDMENT NO. 1 TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933
                               ..................
                          PRIME MEDICAL SERVICES, INC.
             (Exact name of registrant as specified in its charter)
                               Delaware 74-2652727
                (State or other jurisdiction of (I.R.S. Employer
               incorporation or organization) Identification No.)

                   1301 Capital of Texas Highway, Suite C-300
                            Austin, Texas 78746-6550
                                 (512) 328-2892
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)
                               ..................
                               KENNETH S. SHIFRIN
                          Prime Medical Services, Inc.
                   1301 Capital of Texas Highway, Suite C-300
                            Austin, Texas 78746-6550
                                 (512) 328-2892
            (Name, address, including zip code, and telephone number
             including area code, of registrant's agent for service)
                               ..................
                                   Copies to:
                                TIMOTHY L. LAFREY
                    Akin, Gump, Strauss, Hauer & Feld, L.L.P.
                         816 Congress Avenue, Suite 1900
                               Austin, Texas 78701
                                 (512) 499-6200
                               Fax: (512) 499-6290
 
     Approximate date of commencement of proposed sale to the public:  from time
to time after this Registration Statement becomes effective.
                               ..................
     If any of the  securities  being  registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. [_]
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]
     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [_]
     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [_]
     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
                         CALCULATION OF REGISTRATION FEE
<TABLE>
====================================================================================================================
<S>                                                          <C>               <C>             <C>                 <C>              
                                                                                  Proposed         Proposed
                                                               Amount             maximum           maximum          Amount of
                Title of each class of                         to be           offering price      aggregate       registration
              securities to be registered                    registered         per share(1)   offering price(2)        fee

Common Stock, $.01 par value (2)                             3,064,503            $11.75         $36,007,910         $10,623

====================================================================================================================
</TABLE>

     (1) Estimated solely for the purpose of calculating the registration fee in
accordance with Rule 457(c),  using the average of the high and low sales prices
reported on The Nasdaq  National  Market for the  Registrant's  Common  Stock on
March 5, 1998.
     (2) The  Registration  Statement also pertains to rights to purchase shares
of Common Stock of the Registrant. One right is attached to and trades with each
share of Common Stock of the Registrant. Until the occurrence of certain events,
the rights are not  exercisable  and will not be evidenced or transferred  apart
from the Common Stock.
                               ..................
     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933, as amended,  or until the  Registration  Statement
shall become  effective on such date as the Securities and Exchange  Commission,
acting pursuant to said Section 8(a), may determine.






<PAGE>

PROSPECTUS                                                
                                                          
                                3,064,503 Shares

                          Prime Medical Services, Inc.

                                  Common Stock


     This  prospectus may be used in connection  with the  distribution of up to
3,064,503  shares (the  "Shares") of the Company's  Common Stock  proposed to be
disposed  of from  time  to time by  American  Physicians  Service  Group,  Inc.
("APS").  See  "Selling  Stockholder."  The Company  will not receive any of the
proceeds  from the sale of shares by APS.  APS will  bear the  expenses  of this
registration. The Company's Common Stock is traded on The Nasdaq National Market
under the symbol "PMSI." On March 18, 1998, the last sale price of the Common
Stock as reported on The Nasdaq National Market was $12.4375 per share.

     See "Risk  Factors"  for a  discussion  of certain  factors  that should be
considered by prospective investors.

                               ..................



    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
      SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.


     The  distribution of the Shares by APS may be effected from time to time in
one or more  transactions  (which may involve block  transactions) on The Nasdaq
National Market, in the over-the-counter market, or on any exchange on which the
Common Stock may then be listed, in negotiated transactions or otherwise.  Sales
will be effected at such prices and for such  consideration as may be obtainable
from time to time.  Commission expenses and brokerage fees, if any, will be paid
by APS. See "Plan of Distribution."

                The date of this Prospectus is March 19, 1998.

     
<PAGE>



                                      
                              AVAILABLE INFORMATION

     The Company is subject to the  informational  requirements  of the Exchange
Act and, in accordance  therewith,  files  reports,  proxy  statements and other
information with the Commission. Reports, proxy statements and other information
filed by the  Company  can be  inspected  and  copied  at the  public  reference
facilities  maintained by the Commission at 450 Fifth Street, N.W.,  Washington,
D.C.  20549,  and at the  Commission's  Regional  Offices at Seven  World  Trade
Center,  13th Floor,  New York,  New York 10048 and  CitiCorp  Center,  500 West
Madison  Street,  Suite  1400,  Chicago,  Illinois  60661-2511.  Copies  of such
material  can be  obtained  by mail from the  Public  Reference  Section  of the
Commission at 450 Fifth Street,  N.W.,  Washington,  D.C.  20549,  at prescribed
rates.  Such reports,  proxy  statements  and other  information  concerning the
Company are also available for inspection at the offices of The Nasdaq  National
Market,  Reports  Section,  1735 K Street,  N.W.,  Washington,  D.C. 20006.  The
Commission  maintains a Web site that contains  reports,  proxy and  information
statements and other information  regarding registrants that file electronically
with the Commission at "http://www.sec.gov."

     The Company has filed with the Commission a Registration  Statement on Form
S-3 (herein,  together  with all  amendments  and  exhibits,  referred to as the
"Registration  Statement")  under the  Securities Act with respect to the Common
Stock offered  hereby.  This  Prospectus does not contain all of the information
set forth in the Registration Statement,  certain parts of which were omitted in
accordance  with the  rules  and  regulations  of the  Commission.  For  further
information,  reference  is  hereby  made  to the  Registration  Statement.  Any
statements  contained herein  concerning the provisions of any document filed as
an exhibit to the Registration  Statement or otherwise filed with the Commission
are not necessarily complete, and in each instance reference is made to the copy
of such document so filed.  Each such  statement is qualified in its entirety by
such reference.

                       DOCUMENTS INCORPORATED BY REFERENCE

     The  following  documents  filed by the  Company  with the  Commission  are
incorporated herein by reference:
     (1) The  Company's  Annual  Report on Form 10-K for its  fiscal  year ended
         December 31, 1996;
     (2) The Company's  Quarterly  Report on Form 10-Q for the quarterly  period
         ended March 31, 1997;
     (3) The Company's  Quarterly  Report on Form 10-Q for the quarterly  period
         ended June 30, 1997;
     (4) The Company's  Quarterly  Report on Form 10-Q for the quarterly  period
         ended September 30, 1997;     
     (5) The  description  of the Common Stock  contained in the Company's  Form
         8-A, dated September 14, 1993; and
     (6) The  description  of the rights issued to  stockholders  of the Company
         contained in the Company's Form 8-A, dated March 10,1994.
 
     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date of this Prospectus and prior to
the termination of this offering shall be deemed to be incorporated by reference
into this  Prospectus  and to be a part  hereof  from the date of filing of such
documents.  Any statement  contained in a document  incorporated or deemed to be
incorporated  by reference  herein shall be deemed to be modified or  superseded
for purposes of this Prospectus to the extent that a statement  contained herein
or in any other  subsequently  filed  document  which also is or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any such
statement so modified or superseded  shall not be deemed,  except as so modified
or superseded, to constitute a part of this Prospectus.

     The Company  will provide  without  charge to each person to whom a copy of
this Prospectus is delivered, upon the written or oral request of such person, a
copy of any or all of the documents which are incorporated by reference  herein,
other than exhibits to such  documents  (unless such  exhibits are  specifically
incorporated by reference into such documents). Such requests should be directed
to Prime Medical  Services,  Inc.,  1301 Capital of Texas Highway,  Suite C-300,
Austin, Texas 78746-6550, Attention: Chief Financial Officer.

                                      2
<PAGE>

                               PROSPECTUS SUMMARY

     The  following  summary  is  qualified  in its  entirety  by  the  detailed
information appearing elsewhere in this Prospectus. Unless the context otherwise
requires,  the  "Company"  refers  to  Prime  Medical  Services,  Inc.  and  its
consolidated  subsidiaries  and affiliated  partnerships  and limited  liability
companies.

                                   The Company

     The Company is a Delaware corporation.  Its principal executive offices are
located at 1301 Capital of Texas Highway,  Suite C-300, Austin, Texas 78746, and
its telephone number is (512) 328-2892.  The Company's Common Stock is quoted on
The Nasdaq National Market under the symbol "PMSI."

                                  Risk Factors

     Prospective  investors should carefully  consider the factors  discussed in
detail elsewhere in this Prospectus under the caption "Risk Factors."

     Certain statements  contained herein are not based on historical facts, but
are  forward-looking  statements that are based upon numerous  assumptions about
future  conditions  that  could  prove  not  to  be  accurate.   Actual  events,
transactions  and results may  materially  differ from the  anticipated  events,
transactions or results  described in such statements.  The Company's ability to
consummate  such  transactions  and achieve such events or results is subject to
certain risks and uncertainties.  Such risks and uncertainties  include, but are
not limited to, the  existence  of demand for and  acceptance  of the  Company's
services,  the  availability  of appropriate  candidates for  acquisition by the
Company,  regulatory approvals,  economic conditions,  the impact of competition
and  pricing,  results of  financing  efforts and other  factors  affecting  the
Company's  business  that are beyond the  Company's  control,  including but not
limited to the matters described in "Risk Factors." See "Risk Factors."

                                  The Offering

 .........Common Stock offered by APS                           3,064,503 shares
 .........Common Stock outstanding after the offering(1)       19,314,267 shares
 .........Nasdaq symbol                                                 PMSI
 ..............

     (1) Based on the number of shares  outstanding  as of  March  9,  1998.
Excludes options  outstanding on March 9,  1998, to purchase up to 1,339,000
shares of Common  Stock at a weighted  average  exercise  price  of $11.03  per
share. Also excludes 125,000 shares of Common Stock available for issuance under
the Prime Medical Services, Inc. 1993 Stock Option Plan.




                                      3
<PAGE>



                                       

                                  RISK FACTORS

     Prospective  investors  should  carefully  consider the following  factors,
together with the other information set forth in this Prospectus,  in evaluating
an investment in shares of Common Stock of the Company.

Acquisition Growth Strategy

     The Company has followed an aggressive acquisition strategy since 1992 that
has  resulted in rapid  growth in its  business.  This  acquisition  strategy is
dependent on the continued  availability of suitable acquisition  candidates and
subjects the Company to the risks inherent in assessing  acquisition  candidates
and integrating and managing the operations of acquired companies. The Company's
growth is also expected to place significant  demands on the Company's financial
and  management  resources.  Moreover,  the  Federal  Trade  Commission  ("FTC")
initiated an investigation in 1991 to determine whether the limited partnerships
in which Lithotripters, Inc., now a wholly-owned subsidiary of the Company, was
the  general  partner  posed  an  unreasonable  threat  to  competition  in  the
healthcare field. While the FTC closed its investigation and took no action, the
FTC or another governmental authority charged with the enforcement of federal or
state antitrust laws or a private  litigant might, due to the Company's size and
market share, seek to (i) restrict the Company's future growth by prohibiting or
restricting the acquisition of additional lithotripsy facilities or (ii) require
that the Company divest of certain of its lithotripsy operations.  Consequently,
there can be no  assurance  that the Company will be able to continue to grow or
that  its  growth  strategy  will  prove  successful.  Moreover,  in view of the
Company's   significant  recent  growth,  the  Company's   historical  financial
performance  may not be  indicative  of its future  performance.  The  Company's
failure to implement its growth strategy successfully could adversely affect the
Company.

Operations Subject to Government Regulation; Recent Regulatory Proposals

     The  Company is subject to  extensive  regulation  by both the  federal and
state  governments.  The  Company  is  subject  to  Section  1128B of the Social
Security Act (known as the "Illegal Remuneration Statute"),  which imposes civil
and  criminal  sanctions  on  persons  who  solicit,  offer,  receive or pay any
remuneration,  directly or  indirectly,  for  referring,  or  arranging  for the
referral  of, a patient  for  treatment  that is paid for in whole or in part by
Medicare,  Medicaid or similar government  programs.  The federal government has
published  regulations  that provide  exceptions  or a "safe harbor" for certain
business transactions.  Transactions that are structured within the safe harbors
are deemed not to violate the Illegal Remuneration Statute. Transactions that do
not satisfy all elements of a relevant  safe harbor do not  necessarily  violate
the  Illegal  Remuneration  Statute,  but may be subject to greater  scrutiny by
enforcement agencies.  The arrangements between the Company and the partnerships
and other  entities in which it owns an indirect  interest and through which the
Company  provides  most  of its  lithotripsy  services  (and  the  corresponding
arrangements  between  such  partnerships  and other  entities  and the treating
physicians  who own  interests  therein and who use the  lithotripsy  facilities
owned by such  partnerships and other entities) could  potentially be questioned
under  the  illegal  remuneration  prohibition  and  may  not  fall  within  the
protection afforded by these safe harbors. Many states also have laws similar to
the Federal Illegal Remuneration Statute.  While failure to fall within the safe
harbors  may subject  the  Company to  scrutiny  under the Illegal  Remuneration
Statute,   such  failure  does  not   constitute  a  violation  of  the  Illegal
Remuneration Statute. Nevertheless,  these illegal remuneration laws, as applied
to  activities  and  relationships  similar to those of the  Company,  have been
subjected to limited judicial and regulatory interpretation, and the Company has
not obtained or applied for any opinion of any regulatory or judicial  authority
that its business operations and affiliations are in compliance with these laws.
Therefore,  no  assurances  can be given that the Company's  activities  will be
found to be in compliance with these laws if scrutinized by such authorities.

     Section  1877 of the Social  Security  Act  ("Stark  II")  imposes  certain
restrictions  upon  referring  physicians  and  providers of certain  designated
health services under the Medicare,  Medicaid and Champus programs  ("Government
Programs"). Subject to certain exceptions, Stark II provides that if a physician
(or a family member of a physician) has a financial relationship with an entity:
(i) the  physician  may not make a referral to the entity for the  furnishing of
designated  health services under the Government  Programs;  and (ii) the entity
may not bill Government  Programs,  any individual or any third-party  payor for
designated  health  services  pursuant  to  a  prohibited   referral  under  the
Government Programs. The prohibitions of Stark II only apply to the treatment of
Government Program patients, and


                                       4
<PAGE>

have no  application  to  services  performed  for  non-government  program
patients.  Entities and  physicians  committing  an act in violation of Stark II
will be required to refund  amounts  collected  in  violation of the statute and
also are subject to civil money  penalties and to exclusion  from the Government
Programs.  Of the  Company's  lithotripsy  revenues  for the nine  months  ended
September 30, 1997,  77% were  attributable  to affiliates of the Company having
referring  physician-investors.  Urologists are investors in 43 of the Company's
61  lithotripsy   operations,   and  the  two  Company   affiliates  engaged  in
thermotherapy   services  have   referring   physician-investors   (the  Company
lithotripsy and thermotherapy affiliates with referring  physician-investors are
referred to herein as the "Company Physician Entities").

     Many key terms in Stark II  are not  adequately  defined and the statute is
silent  regarding  its  application  to vendors,  such as the Company  Physician
Entities,  contracting "under  arrangements" with hospitals for the provision of
outpatient  services.  Since the passage of  Stark II,  the Company  interpreted
Stark II  consistently  with the informal view of the General Counsel for Health
and Human  Services,  and concluded that the statute did not apply to its method
of conducting business.  Based upon a reasonable  interpretation of Stark II, by
referring  a patient to a hospital  furnishing  the  outpatient  lithotripsy  or
thermotherapy services "under arrangements" with the Company Physician Entity, a
physician  investor in a Company Physician Entity is not making a referral to an
entity (the hospital) in which they have an ownership interest.

     On January 9, 1998, the federal government  published proposed  regulations
under  Stark  II (the  "Proposed  Stark  Regulations").  By  clarifying  certain
ambiguities and defining certain statutory terms, the Proposed Stark Regulations
and accompanying  commentary apply the physician referral  prohibitions of Stark
II  to  the  Company  Physician   Entities'   practice  of  contracting   "under
arrangements"  with  hospitals for  treatment and billing of Government  Program
patients.  Only hospitals can bill the Government  Programs for  lithotripsy and
thermotherapy  services;  thus contracting under arrangements with hospitals was
the  way  the  Company  Physician  Entities  economically  participated  in  the
treatment of Government Program patients.  Absent a restructuring of traditional
operations,  to  comply  with the  government's  interpretation  of Stark II the
physician-investors   will  be  prohibited  from  referring  Government  Program
patients to the hospitals  contracting with the Company Physician Entities.  The
Company  cannot  predict when final Stark II  regulations  will be issued or the
substance  of the final  regulations,  but the  interpretive  provisions  of the
Proposed Stark  Regulations  may be viewed as the federal  government's  interim
enforcement   position  until  final   regulations  are  issued.   Restructuring
traditional  operations may reduce  Company  revenues and limit future growth by
(i) reducing or eliminating revenues attributable to the treatment of Government
Program patients by Company Physician Entities,  (ii) reducing revenues from the
treatment  of non-government  patients by Company  Physician  Entities  due to
physician,  hospital and third-party  payor anxiety and concern created by Stark
II,  (iii)  requiring  the  Company  Physician  Entities  to  restructure  their
operations  to comply  with  Stark  II,  (iv)  restricting  the  acquisition  or
development of additional lithotripsy or thermotherapy operations that will both
treat Government  Program patients and have referring  physician-investors,  (v)
impairing  the  Company's   relationship  with  urologists  and  (vi)  otherwise
materially adversely impacting the Company.
 
     Many  states  currently  have  laws  similar  to Stark II that  restrict  a
physician with a financial  relationship with an entity from referring  patients
to that entity.  Often these laws contain statutory exceptions for circumstances
where the referring  physician,  or a member of his practice group, treats their
own patients.  States also commonly  require  physicians to disclose to patients
their financial  relationship with an entity. The Company believes that it is in
material   compliance   with  these  state  laws.   Nevertheless,   these  state
self-referral laws, as applied to activities and relationships  similar to those
of  the  Company,  have  been  subjected  to  limited  judicial  and  regulatory
interpretation,  and the Company has not  obtained or applied for any opinion of
any  regulatory  or  judicial   authority  that  its  business   operations  and
affiliations are in compliance with these laws. Therefore,  no assurances can be
given that the Company's activities will be found to be in compliance with these
laws if scrutinized by such authorities.

     In addition,  upon the  occurrence of changes in the law that may adversely
affect  operations,  the  Company is  required  to  purchase  the  interests  of
physician-investors  for  certain  of  the  Company  Physician  Entities.  These
mandatory purchase  obligations require the payment by the Company of a multiple
of earnings  similar to  multiples  used by the Company in pricing the  original
acquisition of such  interests.  The Company  estimates that, as of December 31,
1997, the aggregate  potential cost of all such  mandatory  purchases  would not
exceed $6  million.  To the extent the  Company is  required  to  purchase  such
interests, such purchases might cause a default under the terms

                                       5
<PAGE>

the extent  the  Company is  required  to  purchase  such  interests,  such
purchases might cause a default under the terms of the Company's credit facility
and other  indebtedness,  impair the Company's  relationship with urologists and
otherwise   have  a  material   adverse   impact  on  the  Company.   Regulatory
developments,  such as the Proposed Stark  Regulations,  might also dictate that
the Company purchase all the interests of its physician-investors, regardless of
any contractual  requirements to do so, or substantially  alter its business and
operations to remain in compliance with  applicable  laws. A purchase of all the
physician-investors  in the Company Physician Entities would require significant
resources,  and there  can be no  assurance  that the  Company  could  fund such
acquisitions.  Additionally, there can be no assurance that the Company will not
be required to change its  business  practices or its  investment  relationships
with  urologists  or that the Company  will not  experience  a material  adverse
effect  as a result  of any  challenge  made by a  federal  or state  regulatory
agency.  In addition,  there can be no assurance that physician-  investors who,
voluntarily  or  otherwise,  divest  of their  interests  in  Company  Physician
Entities will continue to refer patients at the same rate or at all.
 
Uncertainties Related to Changing Healthcare Environment

     The  healthcare  industry  has  experienced  substantial  changes in recent
years. Although managed care has yet to become a major factor in the delivery of
lithotripsy or thermotherapy services, the Company anticipates that managed care
programs,  including  capitation  plans,  may  play  an  increasing  role in the
delivery of lithotripsy  and  thermotherapy  services and that  competition  for
these services may shift from  individual  practitioners  to health  maintenance
organizations and other significant  providers of managed care. No assurance can
be given  that the  changing  healthcare  environment  will not have a  material
adverse effect on the Company.

     In  addition,  the  hospitals  and  surgery  centers  to which the  Company
provides  services are reimbursed for  lithotripsy  and  thermotherapy  services
under  various  federal and state  programs,  including  Medicare,  Medicaid and
Champus,  primarily at fixed rates.  These programs are subject to statutory and
regulatory  changes,  administrative  rulings,  interpretations  of  policy  and
governmental  funding  restrictions,  all  of  which  may  have  the  effect  of
decreasing program payments, increasing costs or requiring the Company to modify
the way in which it operates  its  business.  The Company is not able to predict
whether  changes  will be made in the  rates  prescribed  by these  governmental
programs.  Furthermore,  over the last several  years,  there has been a general
trend toward lower reimbursement rates for healthcare services by government and
other third-party  payors.  Such reimbursement  reductions could have a material
adverse effect on the Company.  Furthermore,  increases in operating  costs that
are subject to inflation, such as labor and supply costs, without a compensating
increase in prescribed rates may adversely affect the Company.

     There have been  numerous  initiatives  at the federal and state levels for
comprehensive  reforms  affecting the payment for and availability of healthcare
services,  including services provided by the Company. The Company believes that
such initiatives may continue in the future. Aspects of certain of these reforms
as proposed in the past could, if adopted, adversely affect the Company.

Risks Inherent in the Provision of Medical Services

     The  urologists  who  use the  Company's  lithotripters  and  thermotherapy
devices are involved in the delivery of  healthcare  services to the public and,
therefore,  are  exposed  to the risk of  liability  claims.  Since the  Company
typically  operates  the  lithotripters  and  thermotherapy  devices used by the
urologists  and  provides  nurses  and/or  radiology  technicians  to assist the
urologists in the use of lithotripters  and thermotherapy  devices,  the Company
may also be named in a claim against a urologist in connection with performing a
lithotripsy or thermotherapy procedure at the Company's facilities. Although the
Company  has not  experienced  any losses due to claims  for  malpractice,  such
claims,  if  successful,  could  result  in  substantial  damage  awards  to the
claimants  which may  exceed the limits of any  applicable  insurance  coverage.
While the Company maintains  professional  liability insurance,  there can be no
assurance that any such claims against the Company will not exceed the amount of
insurance  maintained.   Successful  malpractice  claims  asserted  against  the
Company, to the extent not covered by the Company's liability  insurance,  could
adversely affect the Company.

Competition

     The lithotripsy  services industry is fragmented and highly  competitive in
many  respects.  Moreover,  certain  of  the  Company's  current  and  potential
competitors have substantially greater financial resources than the Company

                                       6
<PAGE>


and may compete  with the  Company  for  acquisitions  and  development  of
operations  in markets  targeted by the  Company.  The  Company has  experienced
competition  in the  acquisition  of  existing  lithotripsy  facilities  and the
development  of  relationships  with treating  physicians.  The Company has also
experienced  competition  from hospitals or treating  physicians who have opened
their own lithotripsy facilities.  Such competition could intensify in the event
of a  decrease  in the  purchase  price of  lithotripters,  as a  result  of the
development of less  expensive  lithotripsy  equipment,  if the supply of new or
used  lithotripters  increases over time, or as a result of regulatory  changes.
Most of the Company's  lithotripsy  services  agreements have matured past their
initial  terms and are now in annual  renewal  terms or are on a  month-to-month
basis,  which  increases  the risk  that a large  number  of  agreements  may be
terminated over a relatively short period of time. Another significant  provider
of lithotripsy services is also a manufacturer of lithotripsy  equipment,  which
may  create  different  incentives  for such  provider  in  pricing  lithotripsy
services.  Moreover,  the Company competes with alternative kidney stone disease
treatments.

Technological Changes

     The equipment and software  utilized by the Company in the provision of its
lithotripsy  services and other business  activities have been  characterized by
technological  changes.  The  development of new  technologies or refinements of
existing  ones might  render  the  Company's  existing  equipment  and  software
technologically  or economically  obsolete.  Regulatory  approvals have recently
been  received for smaller and less  expensive  lithotripsy  equipment  that can
either be utilized as a mobile or fixed site  operation  and can be  transported
with smaller and less  expensive  vehicles  than those  utilized by the Company.
Although  this  compact  lithotripsy  technology  is  relatively  new and not in
widespread  use,  the  availability  of such  technology  could  materially  and
adversely  affect  the  Company's  business.  There  is  also  a risk  that  the
particular   manufacturers  of  the  Company's  equipment  may  discontinue  the
manufacture of such equipment or may not offer  equipment and software  upgrades
necessary to keep such equipment  technologically current. Even if such upgrades
are  available,  there  can be no  assurance  that  the  Company  will  have the
financial resources to acquire them.

Dependence on Key Personnel

     The Company is dependent upon the services and management experience of the
Company's  executive  officers,  including  Kenneth S. Shifrin,  Chairman of the
Board, Joseph Jenkins,  M.D., President and Chief Executive Officer, and Michael
Madler,  Senior Vice  President-Operations.  The Company does not carry  key-man
life insurance in material  amounts on any of its officers.  The loss of, or the
failure to attract,  qualified  employees could adversely affect the Company. In
addition, the Company's continued growth depends upon its ability to attract and
retain skilled  employees,  particularly  highly skilled  lithotripsy nurses and
radiology technicians.

Dependence on Physicians

     The Company depends upon the treatment of patients by urologists practicing
in the  communities  served by the  Company's  lithotripters  and  thermotherapy
units. In some cases, the Company's affiliated  physician-investors have entered
into noncompetition  agreements with the Company under which they have agreed to
refrain from owning interests in competing  facilities for various periods.  The
enforceability of these noncompetition agreements is generally a matter of state
law, varies from state-to-state and is evolving over time. Additionally, in some
cases the Company may be forced to purchase the minority ownership  interests of
affiliated  physician-investors under mandatory repurchase arrangements existing
between the Company and such physician-investors. The loss of relationships with
key treating  urologists at a particular  facility,  whether due to  retirement,
relocation,  dissatisfaction  with the Company's  services,  regulatory referral
prohibitions or other factors, could adversely affect the Company.

Antitakeover Provisions

     The Company's Rights Agreement (which entitles the Company's  stockholders,
other than certain acquiring persons, under the circumstances described therein,
to purchase  Common  Stock or the common stock of certain  acquiring  persons at
prices  equal to one-half  of the fair  market  value  thereof),  the  Company's
Certificate  of  Incorporation  and certain  provisions of the Delaware  General
Corporation Law include several provisions that may have the effect of deterring
hostile  takeovers,  delaying  or  preventing  changes  in control or changes in
management

                                       7
<PAGE>


of the  Company,  or  limiting  the  ability  of  stockholders  to  approve
transactions that they may deem to be in their best interests.

Shares Eligible for Future Sale; Registration Rights

     Sales of  substantial  amounts of Common Stock in the public  market or the
perception  that such sales might occur could  adversely  affect the  prevailing
market price for the Common Stock and the ability of the Company to raise equity
capital.  The Company cannot predict the effect, if any, that sales of shares of
its Common Stock,  or the  availability  of shares for future sale, will have on
the market price of the Common Stock  prevailing  from time to time.  Such sales
may also make it more  difficult  for the Company to sell equity  securities  or
equity-related securities at a time and price that it deems appropriate. Certain
stockholders of the Company are also entitled to registration rights.

Dividend Policy and Restrictions

     The Company  does not intend to pay cash  dividends  on the Common Stock in
the foreseeable  future and anticipates that future earnings will be retained to
finance  future  operations and expansion.  The Company's  credit  facility also
prohibits the Company from paying  dividends and making other  distributions  on
its Common Stock.

Year 2000 Compliance

     The Company is aware of the issues  associated with the programming code in
existing  computer systems as the year 2000 approaches.  The "year 2000 problem"
is pervasive and complex as virtually every computer  operation will be affected
in some way by the  rollover  of the two digit  year  value to 00.  The issue is
whether computer systems will properly recognize date sensitive information when
the  year  changes  to  2000.  Systems  that  do  not  properly  recognize  such
information could generate erroneous data or cause a system to fail. The Company
does not  anticipate  that it will incur  significant  operating  expenses or be
required to invest  heavily in  computer  systems  improvements  to be year 2000
compliant.  However,  significant  uncertainty  exists  concerning the potential
costs  and  effects  associated  with any year  2000  compliance.  Any year 2000
compliance  problem of either the Company or its vendors,  third party payors or
customers  could  have a  material  adverse  effect on the  Company's  business,
results of operations, financial condition and prospects.

                                       8
<PAGE>





                                 USE OF PROCEEDS

     The Company  will not receive any of the  proceeds  from the sale by APS of
the Shares  offered  hereby.  All of the filing  fees and the  expenses  of this
Registration Statement will be borne in full by APS.


                                       9
<PAGE>




                             THE SELLING STOCKHOLDER

     The following table sets forth certain information regarding the beneficial
ownership of the Common Stock as of March 1, 1998, and as adjusted to reflect
the sale of the Common Stock offered  hereby,  by APS.  Although there can be no
assurance  that APS will  sell any or all of the  Shares,  the  following  table
assumes that APS will sell all Shares registered herein.
<TABLE>

                                                        Beneficial Ownership     Number     Beneficial Ownership
                                                       Prior to the Offering   of Shares     After the Offering
<S>                                                    <C>            <C>      <C>          <C>          <C>
                                                         Number of             Registered    Number of
Name                                                      Shares      Percent    Herein       Shares      Percent
American Physicians Service Group, Inc.                    3,064,503      15.9   3,064,503       -            -
 1301 Capital of Texas Highway
 Austin, Texas 78746
</TABLE>


     APS is the Company's largest  stockholder and is a management and financial
services firm which,  through its  subsidiaries,  provides  medical  malpractice
insurance  services  for doctors and  investment  services to  institutions  and
individuals.  APS is  headquartered  in Austin,  Texas and maintains  offices in
Dallas and Houston.

     At February 1, 1995 the Company owned 772,000 shares of the common stock of
APS, which constituted approximately 22% of the total shares of the common stock
of APS then issued and  outstanding.  During  1995,  the Company  retired a note
payable to APS by  transferring to APS 87,000 shares of common stock of APS that
the Company  owned.  During 1995, the Company also sold 635,000 shares of common
stock of APS to third parties for $2,760,000.  The Company currently owns 50,000
shares of common stock of APS.

     Kenneth S.  Shifrin and William A.  Searles are each  directors of both the
Company and APS and,  together with the other officers and directors of APS, may
share in the voting and  investment  power with  respect to the shares of Common
Stock of the Company owned by APS. Each of such persons disclaims the beneficial
ownership of any such shares.  Mr.  Shifrin has been Chairman of the Board and a
director of the Company  since  October 1989 and has been Chairman of the Board,
Chief Executive  Officer and a director of APS since March 1990,  March 1989 and
February  1987,  respectively.  Mr.  Searles  has been a director of the Company
since October 1989 and has been a director of APS since July 1989.

     The Company occupies  approximately 5,575 square feet of office space owned
by APS and also shares certain personnel with APS. The Company pays APS rent and
personnel cost reimbursements of approximately $7,500 per month.

                          DESCRIPTION OF CAPITAL STOCK

     The  following  summary  is a  description  of  certain  provisions  of the
Company's  Certificate  of  Incorporation,   as  amended  (the  "Certificate  of
Incorporation"). Such summary does not purport to be complete and is subject to,
and is qualified in its entirety by, all of the provisions of the Certificate of
Incorporation.

     The Company's  authorized  capital stock  consists of 40,000,000  shares of
Common  Stock,  $0.01 par value per share,  and  1,000,000  shares of  Preferred
Stock, $0.01 par value per share ("Preferred Stock").

Common Stock

     As of March  9,  1998,  there were  19,314,267  shares of Common  Stock
issued and  outstanding.  Holders of Common  Stock are  entitled to one vote for
each share held of record on all matters  submitted  to a vote of  stockholders.
There are no cumulative voting rights applicable to the Common Stock. Subject to
the preferences applicable to shares of Preferred Stock outstanding at any time,
holders of shares of Common  Stock are  entitled  to  dividends  if, when and as
declared by the Board of Directors from funds legally available therefor and are
entitled, in the event of liquidation,  to share ratably in all assets remaining
after payment of liabilities and Preferred Stock


                                       10
<PAGE>

references, if any. The authorized but unissued shares of Common Stock are
available for issuance  without  further  action by the Company's  stockholders,
unless  such  action is  required  by  applicable  law or the rules of any stock
exchange  or trading  system on which the Common  Stock may be listed or quoted.
Shares  of Common  Stock  are not  redeemable  and  there  are no  sinking  fund
provisions.

Preferred Stock

     The  Board of  Directors  is  authorized,  without  further  action  by the
Company's  stockholders,  to issue  Preferred  Stock from time to time in one or
more  classes or series and to fix,  as to any such class or series,  the voting
rights,  if  any,  applicable  to  such  series  and  such  other  designations,
preferences  and  special  rights  as the  Board  of  Directors  may  determine,
including   dividend,   conversion,   redemption  and  liquidation   rights  and
preferences. There are no shares of Preferred Stock outstanding. The issuance of
shares of Preferred Stock under certain  circumstances  could have the effect of
delaying or  preventing  a change in control of the  Company or other  corporate
actions.

Indemnification and Limitations on Directors' Liability

     The Certificate of Incorporation  provides that the Company shall indemnify
any  person  who  was or is a party  or is  threatened  to be made a party  to a
proceeding  by reason of the fact that he or she is or was a director or officer
of the Company or, while a director or officer of the Company, is or was serving
at the request of the Company in some capacity with another business enterprise,
to the fullest extent permitted by law.

     The  Certificate  of  Incorporation  also  provides that no director of the
Company  shall be  personally  liable to the  Company  or its  stockholders  for
monetary  damages  for  breach  of  fiduciary  duty as a  director,  except  for
liability (i) for any breach of the director's duty of loyalty to the Company or
its stockholders,  (ii) for acts or omissions not in good faith or which involve
intentional  misconduct  or a knowing  violation  of law,  (iii) in  respect  of
certain unlawful  dividend  payments or stock redemptions or repurchases or (iv)
for any  transaction  from  which the  director  derived  an  improper  personal
benefit.  The  effect of these  provisions  is to  eliminate  the  rights of the
Company and its stockholders (through stockholders'  derivative suits brought on
behalf of the Company) to recover monetary damages against a director for breach
of  fiduciary  duty as a director  (including  breaches  resulting  from grossly
negligent behavior), except in the situations described above.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be  permitted  to  directors,  officers or persons  controlling  the
Company pursuant to the foregoing provisions, the Company has been informed that
in the opinion of the Securities and Exchange  Commission,  such indemnification
is against  public  policy as expressed in the  Securities  Act and is therefore
unenforceable.

Transfer Agent

     The Company's registrar and transfer agent for the Common Stock is American
Stock Transfer & Trust Company.

                              PLAN OF DISTRIBUTION

     The  Shares  may be sold from time to time by APS or by  pledgees,  donees,
transferees or other  successors in interest.  Such sales may be made in any one
or  more   transactions   (which  may  involve   block   transactions)   in  the
over-the-counter market, on The Nasdaq National Market and any exchange in which
the Common Stock may then be listed, or otherwise in negotiated  transactions or
a combination  of such methods of sale, at market prices  prevailing at the time
of sale,  at prices  related to such  prevailing  market prices or at negotiated
prices for such cash or other  consideration  as may be obtainable at such time.
APS may effect such transactions by selling Shares to or through broker-dealers,
and such broker-dealers may sell the Shares as agent or may purchase such Shares
as principal and resell them for their own account  pursuant to this Prospectus.
Such  broker-dealers  may  receive  compensation  in the  form  of  underwriting
discounts,  concessions or commissions from APS and/or purchasers of Shares from
whom they may act as agent  (which  compensation  may be in excess of  customary
commissions).


                                       11
<PAGE>


     The Company has  informed  APS that the  anti-manipulative  rules under the
Exchange  Act (Rules  10b-6  and 10b-7)  may apply to its sales of Shares in the
market. Also, the Company has informed APS of the need for delivery of copies of
the Prospectus in connection with any sale of securities registered hereunder in
accordance with applicable prospectus delivery requirements.

     In connection with such sales, APS and any participating brokers or dealers
may be deemed to be  "underwriters"  as  defined in the  Securities  Act and any
profit  on the sale of the  Shares  by them and any  discounts,  commissions  or
concessions  received  by them may be deemed to be  underwriting  discounts  and
commissions  under the  Securities  Act.  In  addition,  any of the Shares  that
qualify  for sale  pursuant to Rule 144 may be sold under  Rule 144  rather than
pursuant to this Prospectus.

     The Company  will not receive any of the  proceeds  from the sale by APS of
the Shares  offered  hereby.  All of the filing  fees and the  expenses  of this
Registration Statement will be borne in full by APS.

     In order to comply with certain state securities  laws, if applicable,  the
Shares will not be sold in a particular  state unless such  securities have been
registered or qualified for sale in such state or an exemption from registration
or qualification is available and complied with, and, if so required,  will only
be sold in that state through registered or licensed brokers or dealers.

     The Shares originally issued by the Company to APS bear legends as to their
restricted transferability. Upon the effectiveness of the Registration Statement
of which this Prospectus is a part, and the transfer by APS of any of the Shares
pursuant  thereto,  new certificates  representing such Shares will be issued to
the transferee, free of any such legends unless otherwise required by law.

     No  person  is  authorized  to  give  any   information   or  to  make  any
representation,   other  than  those  contained  in  this  Prospectus,  and  any
information  or  representations  not contained in this  Prospectus  must not be
relied upon as having been  authorized.  This  Prospectus does not constitute an
offer to sell or solicitation  of an offer to buy any securities  other than the
registered  securities to which it relates.  This Prospectus does not constitute
an offer to sell or a solicitation of an offer to buy such securities  under any
circumstances where such offer or solicitation is unlawful. Neither the delivery
of this Prospectus nor any sales made hereunder shall,  under any circumstances,
create  any  implication  that  there has been no change in the  affairs  of the
Company  since  the date  hereof  or that the  information  contained  herein is
correct as of any time subsequent to its date.

                                  LEGAL MATTERS

     The validity of the Common Stock offered hereby will be passed upon for the
Company by Akin, Gump, Strauss, Hauer & Feld, L.L.P.

                                     EXPERTS

     The  consolidated  financial  statements  and  schedule  of  Prime  Medical
Services,  Inc. as of December  31, 1996 and 1995,  and for each of the years in
the three-year period ended December 31, 1996, have been incorporated herein and
in the  registration  statement by reference in reliance upon the report of KPMG
Peat Marwick LLP, independent certified public accountants,  incorporated herein
by reference,  and upon the authority of said firm as experts in accounting  and
auditing.



                                       12
<PAGE>

 






No dealer, salesperson or other person has been
authorized to give any information or to make any
representations other than those contained in this
Prospectus and, if given or made, such
information or representations must not be relied
upon as having been authorized by the Company
or APS. This Prospectus does not constitute an
offer to sell or a solicitation of an offer to buy the
shares by anyone in any jurisdiction in which such
offer or solicitation is not authorized, or in which
the person making the offer or solicitation is not
qualified to do so, or to any person to whom it is
unlawful to make such offer or solicitation.
Neither the delivery of this Prospectus nor any
sale made hereunder shall create any implication
that the information contained herein is correct as
of any time subsequent to its date.


                                3,064,503 Shares



                          Prime Medical Services, Inc.


                                  Common Stock




                                _________________

                                   PROSPECTUS
                                _________________





















<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution .

     The  Registrant  estimates  that expenses  payable in  connection  with the
offering described in this Registration  Statement (other than underwriting fees
and commissions) will be as follows:

     Securities and Exchange Commission registration fee............$  11,000
     Printing and mailing expenses..................................    1,000
     Accounting fees and expenses...................................    5,000
     Legal fees and expenses........................................   10,000
     Blue sky fees and expenses.....................................    2,000
     Miscellaneous..................................................    2,000
                                                                    ---------
          Total                                                     $  31,000
                                                                    =========

     APS will pay, or reimburse the Registrant,  for all expenses related to the
offering,  including  those estimated above and  underwriting  fees,  discounts,
commissions, transfer taxes and their attorney's fees, if any.

Item 15.  Indemnification of Directors and Officers.

     The  Certificate  of  Incorporation  of the  Registrant  provides  that the
Registrant  shall indemnify any person who was or is a party or is threatened to
be made a party to a  proceeding  by reason of the fact that he or she (i) is or
was a director or officer of the  Registrant or (ii) while a director or officer
of the  Registrant,  is or was  serving at the  request of the  Registrant  as a
director, officer, partner, venturer,  proprietor,  trustee, employee, agent, or
similar  functionary of another  foreign or domestic  corporation,  partnership,
joint  venture,  sole  proprietorship,  trust,  employee  benefit plan, or other
enterprise,   to  the  fullest  extent  permitted  under  the  Delaware  General
Corporation Law, as the same exists or may hereafter be amended.

     Pursuant to Section 145 of the Delaware  Corporation  Law,  the  Registrant
generally  has the power to  indemnify  its  present  and former  directors  and
officers  against  expenses and liabilities  incurred by them in connection with
any suit to which they are, or are  threatened  to be made, a party by reason of
their  serving in those  positions  so long as they acted in good faith and in a
manner they reasonably  believed to be in, or not opposed to, the best interests
of the Registrant,  and with respect to any criminal action, so long as they had
no reasonable cause to believe their conduct was unlawful. With respect to suits
by or in the right of the  Registrant,  however,  indemnification  is  generally
limited to attorneys' fees and other expenses and is not available if the person
is adjudged to be liable to the  Registrant,  unless the court  determines  that
indemnification is appropriate. The statute expressly provides that the power to
indemnify  authorized  thereby is not exclusive of any rights  granted under any
bylaws,   agreement,   vote  of  stockholders  or  disinterested  directors,  or
otherwise.  The Registrant also has the power to purchase and maintain insurance
for its directors and officers and has obtained such insurance.

     The preceding  discussion of the Registrant's  Certificate of Incorporation
and Section 145 of the Delaware  General  Corporation  Law is not intended to be
exhaustive and is qualified in its entirety by the Certificate of  Incorporation
and Section 145 of the Delaware General Corporation Law.

     The Registrant has entered into  indemnity  agreements  with certain of its
directors and officers.  Pursuant to these  agreements,  the Registrant will, to
the extent permitted under  applicable law,  indemnify these persons against all
judgments, expenses, fines and penalties incurred in connection with the defense
or the settlement of any actions brought against them by reason of the fact that
they are or were  directors or officers of the  Registrant  or that they assumed
certain responsibilities at the direction of the Registrant.



                                      II-1

<PAGE>

Item 16. Exhibits.
           (5) Opinion of Akin, Gump, Strauss, Hauer & Feld, L.L.P.
          (23) (a) Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P. 
                    (included in Exhibit 5)
               (b) Consent of KPMG Peat Marwick LLP
          (24) Powers of Attorney (included in the signature pages of this 
                    Registration Statement)
Item 17. Undertakings.
     The undersigned Registrant hereby undertakes:
     (1)  To file, during any period in which offers or sales are being made, 
          a post-effective amendment to this Registration Statement:
         (i)      To include any prospectus required in Section 10(a)(3) of 
                    the Securities Act of 1933;
        (ii) To reflect in the  prospectus  any facts or events  arising  after 
               the effective date of the Registration  Statement (or the most 
               recent post-effective amendment  thereof)  which,  individually 
               or  in  the  aggregate,  represent  a fundamental  change in the 
               information set forth in the Registration  Statement;
               and
      (iii) To include any material information with respect to the plan of 
               distribution not previously disclosed in the Registration 
               Statement or any material change to such information in the 
               Registration Statement.
     (2)    That, for the purpose of determining any liability under the 
               Securities Act, each such post-effective amendment shall be 
               deemed to be a new registration statement relating to the 
               securities offered therein, and the offering of such securities
               at that time shall be deemed to be the initial bona fide 
               offering thereof.
     (3)    To remove from registration by means of a post-effective amendment 
               any of the securities being registered which remain unsold at 
               the termination of the offering.  
     (4)    That, for purposes of determining any liability under the Securities
               Act of 1933, each filing of the Registrant's annual report 
               pursuant to section 13(a) or section 15(d) of the Securities 
               Exchange Act of 1934 (and, where applicable, each filing of an 
               employee benefit plan's annual report pursuant to Section
               15(d) of the Securities Exchange Act of 1934) that is 
               incorporated by reference in the Registration Statement shall be
               deemed to be a new registration statement relating to the 
               securities offered therein, and the offering of such securities
               at that time shall be deemed to be the initial bona fide offering
               thereof.
     (5)    That for purposes of determining any liability under the Securities
               Act of 1933, the information omitted from the form of prospectus
               filed as part of this Registration Statement in reliance upon 
               Rule 430A and contained in the form of prospectus filed by the 
               Registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the
               Securities Act of 1933 shall be deemed to be part of the 
               Registration Statement as of the time it was declared effective.
     (6)    That for the purpose of determining any liability under the 
               Securities Act of 1933, each post-effective amendment that 
               contains a form of prospectus shall be deemed to be a new 
               registration statement relating to the securities offered 
               therein, and the offering of such securities at that time shall
               be deemed to be the initial bona fide offering thereof.
     (7)    Insofar as indemnification for liabilities arising under the 
               Securities Act may be permitted to directors, officers and 
               controlling persons of the Registrant pursuant to the foregoing 
               provisions, or otherwise, the Registrant has been advised that 
               in the opinion of the Securities and Exchange Commission such
               indemnification is against public policy as expressed in the 
               Securities Act and is, therefore, unenforceable.  In the event 
               that a claim for indemnification against such liabilities 
               (other than the payment by the Registrant of expenses incurred 
               or paid by a director, officer or controlling person of the 
               Registrant in the successful defense of any action, suit or 
               proceeding) is asserted by such director, officer or controlling
               person in connection with the securities being registered, the 
               Registrant will, unless in the opinion of its counsel the matter
               has been settled by controlling precedent, submit to a court of 
               appropriate jurisdiction the question of whether such 
               indemnification by it is against public policy as expressed in 
               the Act and will be governed by the final adjudication of such 
               issue.

                                      II-2

<PAGE>



                                                     
                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Austin, State of Texas on March 19, 1998.

                              Prime Medical Services, Inc.
 
                              By         /s/ Cheryl Williams 
                                        ---------------------------------------
                                        Cheryl Williams, Vice President-Finance

    
     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.


             Signature                  Title                        Date
     -----------------------      ---------------------       -----------------
                *                 Chairman of the Board       March 19, 1998
    ----------------------          and Director
        Kenneth S. Shiftrin         
                                     
                                     
                *                 President,                  March 19, 1998
    -----------------------         Chief Executive Officer                  
        Joseph Jenkins, M.D.        and Director
                                     
                                     
   /s/ Cheryl Williams            Chief Financial Officer,    March 19, 1998
   -----------------------         Vice President-Finance                      
       Cheryl Williams             and Secretary
                                   (Chief Accounting Officer)
                                     
                *                 Director                    March 19, 1998
   -----------------------
       Paul R. Butrus
                                     
                                     
                *                 Director                    March 19, 1998
   -------------------------
       William E. Foree, M.D.

                                    
                *                 Director                    March 19, 1998
   ----------------------
       Irwin Katz



                                  II-3




<PAGE>


             Signature                  Title                        Date
     -----------------------      ---------------------       ----------------- 

                *                 Director                    March 19, 1998
    -------------------------
        John A. McEntire IV
                                     
                                     
                *                 Director                    March 19, 1998
   -------------------------
       William A. Searles
                                     
                                     
                *                 Director                    March 19, 1998
   -----------------------------
       Michael J. Spalding, M.D.
                                     

   * /s/ Cheryl Williams          Attorney-in-Fact            March 19, 1998
   -----------------------                              
       Cheryl Williams            

                                      II-4

<PAGE>

                                INDEX TO EXHIBITS

Exhibits

      (5) Opinion of Akin, Gump, Strauss, Hauer & Feld, L.L.P. *

     (23) (a) Consent of Akin, Gump, Strauss, Hauer & Feld, L.L.P.  
              (Included in Exhibit 5).  *

          (b) Consent of KPMG Peat Marwick LLP  *
 
     (24) Powers of Attorney  *

- -----------------------
*    Previously filed.


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