<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from the second quarter 2000 report on Form 10-Q for LabOne, Inc. and is qualified in its entirety by reference to such financial statements. </LEGEND> <CIK> 0000830158 <NAME> LABONE, INC. <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-END> JUN-30-2000 <CASH> 1,369,529 <SECURITIES> 0 <RECEIVABLES> 29,703,605 <ALLOWANCES> 2,998,328 <INVENTORY> 2,959,241 <CURRENT-ASSETS> 38,288,644 <PP&E> 85,458,101 <DEPRECIATION> 40,943,299 <TOTAL-ASSETS> 119,365,594 <CURRENT-LIABILITIES> 19,361,930 <BONDS> 32,247,126 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 130,500 <OTHER-SE> 65,845,286 <TOTAL-LIABILITY-AND-EQUITY> 119,365,594 <SALES> 0 <TOTAL-REVENUES> 79,742,069 <CGS> 0 <TOTAL-COSTS> 52,364,300 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 1,291,594 <INTEREST-EXPENSE> 1,098,145 <INCOME-PRETAX> 2,246,943 <INCOME-TAX> 1,465,706 <INCOME-CONTINUING> 781,237 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 781,237 <EPS-BASIC> 0.07 <EPS-DILUTED> 0.07