<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM COMPANY'S
CONDENSED CONSOLIDATED BALANCE SHEET AND STATEMENT OF INCOME TAXES 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>                 3-MOS             3-MOS
<FISCAL-YEAR-END>                  DEC-31-1998      DEC-31-1997
<PERIOD-START>                     JAN-01-1998      JAN-01-1997
<PERIOD-END>                       MAR-31-1998      MAR-31-1997
<EXCHANGE-RATE>                              1                1    
<CASH>                                  10,647           11,493      
<SECURITIES>                           104,721          102,542
<RECEIVABLES>                           72,376           55,244       
<ALLOWANCES>                            (1,298)            (949)
<INVENTORY>                                  0                0
<CURRENT-ASSETS>                       200,294          180,532      
<PP&E>                                  57,998           47,543                                       
<DEPRECIATION>                          28,026           23,733
<TOTAL-ASSETS>                         242,586          215,719 
<CURRENT-LIABILITIES>                   46,861           45,492
<BONDS>                                      0            2,600   
<PREFERRED-MANDATORY>                        0                0
<PREFERRED>                                  0                0
<COMMON>                                   263              221
<OTHER-SE>                             186,803          163,465
<TOTAL-LIABILITY-AND-EQUITY>           242,586          215,719
<SALES>                                 17,581           21,887
<TOTAL-REVENUES>                        72,737           59,559
<CGS>                                   37,248           29,964
<TOTAL-COSTS>                           27,269           23,499
<OTHER-EXPENSES>                             0            4,512
<LOSS-PROVISION>                            31              165
<INTEREST-EXPENSE>                          43               20
<INCOME-PRETAX>                          9,342            7,291
<INCOME-TAX>                             4,940            2,794
<INCOME-CONTINUING>                      4,402            4,497
<DISCONTINUED>                               0                0
<EXTRAORDINARY>                              0                0
<CHANGES>                                    0                0
<NET-INCOME>                             4,402            4,497
<EPS-PRIMARY>                             0.17             0.18
<EPS-DILUTED>                             0.16             0.17