<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM COMPANY'S
CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>                         0001001185
<NAME>                        IDX SYSTEMS CORPORATION
<MULTIPLIER>                  1,000
<CURRENCY>                    U.S. DOLLARS

                                                 
<PERIOD-TYPE>                 6-MOS                    6-MOS
<FISCAL-YEAR-END>             DEC-31-1999              DEC-31-1998
<PERIOD-START>                JAN-01-1999              JAN-01-1998
<PERIOD-END>                  JUN-30-1999              JUN-30-1998
<EXCHANGE-RATE>                         1                        1
<CASH>                              7,338                   13,576
<SECURITIES>                       63,281                  105,469
<RECEIVABLES>                     114,519                   82,231
<ALLOWANCES>                       (2,724)                  (1,842)
<INVENTORY>                             0                        0
<CURRENT-ASSETS>                  203,521                  210,251
<PP&E>                             94,093                   65,530
<DEPRECIATION>                     43,520                   31,371
<TOTAL-ASSETS>                    274,104                  259,943
<CURRENT-LIABILITIES>              63,227                   56,202
<BONDS>                                 0                        0
<PREFERRED-MANDATORY>                   0                        0
<PREFERRED>                             0                        0
<COMMON>                              357                      273
<OTHER-SE>                         201,285                 192,619
<TOTAL-LIABILITY-AND-EQUITY>       274,104                 259,943
<SALES>                            160,905                 164,971
<TOTAL-REVENUES>                   160,905                 164,971
<CGS>                              105,098                  92,461
<TOTAL-COSTS>                       72,432                  56,802
<OTHER-EXPENSES>                     4,045                   3,201
<LOSS-PROVISION>                       246                     301
<INTEREST-EXPENSE>                     858                     434
<INCOME-PRETAX>                    (17,008)                 17,704
<INCOME-TAX>                        (6,180)                 10,340
<INCOME-CONTINUING>                (10,828)                  7,364
<DISCONTINUED>                           0                       0
<EXTRAORDINARY>                          0                       0
<CHANGES>                                0                       0
<NET-INCOME>                       (10,828)                  7,364
<EPS-BASIC>                        (0.39)                   0.27
<EPS-DILUTED>                        (0.39)                   0.26