<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from the first 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> 3-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-END> MAR-31-2000 <CASH> 2,171,418 <SECURITIES> 0 <RECEIVABLES> 31,119,638 <ALLOWANCES> 2,782,834 <INVENTORY> 2,315,989 <CURRENT-ASSETS> 37,635,603 <PP&E> 82,635,603 <DEPRECIATION> 39,414,283 <TOTAL-ASSETS> 117,938,738 <CURRENT-LIABILITIES> 19,370,611 <BONDS> 31,251,192 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 130,500 <OTHER-SE> 65,649,867 <TOTAL-LIABILITY-AND-EQUITY> 117,938,738 <SALES> 0 <TOTAL-REVENUES> 40,581,050 <CGS> 0 <TOTAL-COSTS> 26,583,356 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 758,209 <INTEREST-EXPENSE> 495,279 <INCOME-PRETAX> 1,156,654 <INCOME-TAX> 739,036 <INCOME-CONTINUING> 417,618 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 417,618 <EPS-BASIC> 0.04 <EPS-DILUTED> 0.04