<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 COPORATION
<MULTIPLIER>                  1,000
<CURRENCY>                    U.S. DOLLARS
       
                                            
<PERIOD-TYPE>                 3-MOS               3-MOS
<FISCAL-YEAR-END>             DEC-31-1999         DEC-31-1998
<PERIOD-START>                JAN-01-1999         JAN-01-1998
<PERIOD-END>                  MAR-31-1999         MAR-31-1998
<EXCHANGE-RATE>                         1                   1
<CASH>                             19,819              10,647
<SECURITIES>                       94,026             104,721 
<RECEIVABLES>                      87,136              72,376
<ALLOWANCES>                       (1,556)             (1,298)
<INVENTORY>                             0                   0
<CURRENT-ASSETS>                  213,934             200,294
<PP&E>                             73,865              57,998
<DEPRECIATION>                     38,523              28,026
<TOTAL-ASSETS>                    270,600             242,586
<CURRENT-LIABILITIES>              45,466              46,861
<BONDS>                                 0                   0
<PREFERRED-MANDATORY>                   0                   0
<PREFERRED>                             0                   0
<COMMON>                              267                 263  
<OTHER-SE>                        215,608             186,803
<TOTAL-LIABILITY-AND-EQUITY>      270,600             242,586
<SALES>                            60,181              72,737
<TOTAL-REVENUES>                   60,181              72,737
<CGS>                              39,961              37,248
<TOTAL-COSTS>                      32,086              27,269
<OTHER-EXPENSES>                    1,642                   0
<LOSS-PROVISION>                      356                  31
<INTEREST-EXPENSE>                      0                  43
<INCOME-PRETAX>                   (12,400)              9,342
<INCOME-TAX>                       (5,500)              4,940
<INCOME-CONTINUING>                (6,900)              4,402
<DISCONTINUED>                          0                   0
<EXTRAORDINARY>                         0                   0
<CHANGES>                               0                   0
<NET-INCOME>                       (6,900)              4,402
<EPS-PRIMARY>                       (0.26)               0.17
<EPS-DILUTED>                       (0.26)               0.16