<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
1999 Annual Report on Form 10-K for LabOne, Inc. and is qualified in
its entirety by reference to such financial statements.
</LEGEND>
<CIK> 0000830158
<NAME> LABONE, INC.
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> DEC-31-1999
<CASH> 2,983,644
<SECURITIES> 0
<RECEIVABLES> 28,313,245
<ALLOWANCES> 1,981,285
<INVENTORY> 3,186,853
<CURRENT-ASSETS> 37,246,888
<PP&E> 80,910,886
<DEPRECIATION> 38,106,948
<TOTAL-ASSETS> 118,442,724
<CURRENT-LIABILITIES> 17,798,088
<BONDS> 28,255,139
<PREFERRED-MANDATORY> 0
<PREFERRED> 0
<COMMON> 130,500
<OTHER-SE> 70,898,997
<TOTAL-LIABILITY-AND-EQUITY> 118,442,724
<SALES> 0
<TOTAL-REVENUES> 119,666,534
<CGS> 0
<TOTAL-COSTS> 71,543,532
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 2,877,949
<INTEREST-EXPENSE> 1,410,009
<INCOME-PRETAX> 6,980,849
<INCOME-TAX> 3,355,698
<INCOME-CONTINUING> 2,858,776
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 2,858,776
<EPS-BASIC> 0.27
<EPS-DILUTED> 0.27