<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CARDINAL
HEALTH INC.'S FORM 10-Q FOR THE PERIOD ENDED SEPTEMBER 30, 1999 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          JUN-30-2000
<PERIOD-START>                             JUL-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                             185
<SECURITIES>                                         0
<RECEIVABLES>                                    1,829
<ALLOWANCES>                                      (78)
<INVENTORY>                                      3,568
<CURRENT-ASSETS>                                 6,160
<PP&E>                                           2,879
<DEPRECIATION>                                 (1,284)
<TOTAL-ASSETS>                                   9,437
<CURRENT-LIABILITIES>                            3,657
<BONDS>                                          1,520
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,109
<OTHER-SE>                                       2,572
<TOTAL-LIABILITY-AND-EQUITY>                     9,437
<SALES>                                          6,784
<TOTAL-REVENUES>                                 6,784
<CGS>                                            6,129
<TOTAL-COSTS>                                    6,129
<OTHER-EXPENSES>                                   391
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                (23)
<INCOME-PRETAX>                                    202
<INCOME-TAX>                                        80
<INCOME-CONTINUING>                                122
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       122
<EPS-BASIC>                                       0.44
<EPS-DILUTED>                                     0.43