<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
INTERDENT INC.'S FINANCIAL STATEMENTS FOR THE THREE AND NINE MONTHS
ENDED SEPTEMBER 30, 2000 AND 1999 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 9-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 1,803 539
<SECURITIES> 0 0
<RECEIVABLES> 25,316 20,935
<ALLOWANCES> 0 0
<INVENTORY> 4,999 4,610
<CURRENT-ASSETS> 43,253 38,432
<PP&E> 33,818 30,273
<DEPRECIATION> 0 0
<TOTAL-ASSETS> 296,228 241,213
<CURRENT-LIABILITIES> 46,399 38,965
<BONDS> 0 0
1,482 1,796
12,090 12,090
<COMMON> 24 21
<OTHER-SE> 80,382 63,784
<TOTAL-LIABILITY-AND-EQUITY> 296,228 241,213
<SALES> 214,052 167,037
<TOTAL-REVENUES> 214,052 167,037
<CGS> 0 0
<TOTAL-COSTS> 200,167 156,929
<OTHER-EXPENSES> (60) 1
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> (8,816) (4,619)
<INCOME-PRETAX> 5,009 5,490
<INCOME-TAX> 1,803 1,867
<INCOME-CONTINUING> 0 0
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 3,206 3,623
<EPS-BASIC> 0.15 0.18
<EPS-DILUTED> 0.14 0.16
</TABLE>