<ARTICLE> 5
<CIK> 0000927653
<NAME> McKESSON HBOC, INC.
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-START>                             APR-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                         204,800
<SECURITIES>                                   195,400
<RECEIVABLES>                                3,069,300
<ALLOWANCES>                                   339,200
<INVENTORY>                                  4,060,000
<CURRENT-ASSETS>                             7,326,500
<PP&E>                                       1,136,700
<DEPRECIATION>                                 587,500
<TOTAL-ASSETS>                              10,205,900
<CURRENT-LIABILITIES>                        5,646,000
<BONDS>                                        914,800
<PREFERRED-MANDATORY>                          195,700
<PREFERRED>                                          0
<COMMON>                                         2,800
<OTHER-SE>                                   3,169,100
<TOTAL-LIABILITY-AND-EQUITY>                10,205,900
<SALES>                                     27,429,100
<TOTAL-REVENUES>                            27,429,100
<CGS>                                       25,718,200
<TOTAL-COSTS>                               27,245,400
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              87,100
<INCOME-PRETAX>                                446,900
<INCOME-TAX>                                   169,500
<INCOME-CONTINUING>                            272,800
<DISCONTINUED>                                  23,400
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   296,200
<EPS-BASIC>                                       1.05
<EPS-DILUTED>                                     1.04