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EXHIBIT 99.13
[LETTERHEAD OF BANC OF AMERICA SECURITIES LLC]
CareInsite, Inc.
669 River Drive, Center Two
Elmwood Park, New Jersey 07047-1361
To CareInsite, Inc.:
Banc of America Securities LLC ("Banc of America Securities") hereby consents to
the inclusion of the opinion letter of Banc of America Securities as Annex F to,
and to the reference thereto under the captions "SUMMARY OF THE PROXY
STATEMENT/PROSPECTUS -- Opinions of financial advisors -- CareInsite" and "THE
MERGERS -- Opinions of CareInsite's financial advisors -- Opinion of Banc of
America Securities" in, Amendment No. 1 to the Proxy Statement/Prospectus of
Healtheon/WebMD Corporation ("Healtheon/WebMD"), Medical Manager Corporation
("Medical Manager") and CareInsite, Inc. ("CareInsite") relating to the proposed
merger transactions involving Healtheon/WebMD, Medical Manager and CareInsite.
In giving such consent, we do not admit that we come within the category of
persons whose consent is required under, and we do not admit that we are
"experts" for purposes of, the Securities Act of 1933, as amended, and the rules
and regulations promulgated thereunder.
By:/s/ BANC OF AMERICA SECURITIES LLC
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Banc of America Securities LLC
New York, New York
July 25, 2000
