<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>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-2000
<PERIOD-START>                             JUL-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                             291
<SECURITIES>                                         0
<RECEIVABLES>                                    1,968
<ALLOWANCES>                                      (80)
<INVENTORY>                                      4,041
<CURRENT-ASSETS>                                 6,926
<PP&E>                                           2,905
<DEPRECIATION>                                 (1,300)
<TOTAL-ASSETS>                                  10,280
<CURRENT-LIABILITIES>                            4,153
<BONDS>                                          1,658
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,125
<OTHER-SE>                                       2,735
<TOTAL-LIABILITY-AND-EQUITY>                    10,280
<SALES>                                         14,183
<TOTAL-REVENUES>                                14,183
<CGS>                                           12,807
<TOTAL-COSTS>                                   12,807
<OTHER-EXPENSES>                                   807
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                (51)
<INCOME-PRETAX>                                    476
<INCOME-TAX>                                       181
<INCOME-CONTINUING>                                295
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       295
<EPS-BASIC>                                       1.05
<EPS-DILUTED>                                     1.03