<ARTICLE> 5 <CIK> 0000927653 <NAME> MCKESSON HBOC, INC. <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> MAR-31-2000 <PERIOD-START> APR-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 178,800 <SECURITIES> 182,000 <RECEIVABLES> 2,793,300 <ALLOWANCES> 260,900 <INVENTORY> 3,665,800 <CURRENT-ASSETS> 6,696,400 <PP&E> 1,419,600 <DEPRECIATION> 701,300 <TOTAL-ASSETS> 9,324,900 <CURRENT-LIABILITIES> 4,980,500 <BONDS> 937,600 <PREFERRED-MANDATORY> 195,600 <PREFERRED> 0 <COMMON> 2,800 <OTHER-SE> 2,955,300 <TOTAL-LIABILITY-AND-EQUITY> 9,324,900 <SALES> 8,697,400 <TOTAL-REVENUES> 8,697,400 <CGS> 8,047,300 <TOTAL-COSTS> 8,581,000 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 32,600 <INCOME-PRETAX> 116,400 <INCOME-TAX> 44,800 <INCOME-CONTINUING> 70,100 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 70,100 <EPS-BASIC> 0.25 <EPS-DILUTED> 0.25