WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE>    5
<LEGEND>    This schedule contains summary financial information extracted from
the third quarter 2000 report on Form 10-Q for LabOne, Inc. and is qualified in
its entirety by reference to such financial statements.

<S>                                                      <C>
<PERIOD-TYPE>                                          9-MOS
<PERIOD-START>
<FISCAL-YEAR-END>                                Dec-31-2000
<PERIOD-END>                                     Sep-30-2000
<CASH>                                             1,605,796
<SECURITIES>                                               0
<RECEIVABLES>                                     33,910,190
<ALLOWANCES>                                       3,479,097
<INVENTORY>                                        3,077,548
<CURRENT-ASSETS>                                  43,262,675
<PP&E>                                            87,475,172
<DEPRECIATION>                                    42,424,856
<TOTAL-ASSETS>                                   124,102,559
<CURRENT-LIABILITIES>                             20,276,469
<BONDS>                                           35,408,099
<PREFERRED-MANDATORY>                                      0
<PREFERRED>                                                0
<COMMON>                                             130,500
<OTHER-SE>                                        66,228,524
<TOTAL-LIABILITY-AND-EQUITY>                     124,102,559
<SALES>                                                    0
<TOTAL-REVENUES>                                 123,368,602
<CGS>                                                      0
<TOTAL-COSTS>                                     82,047,170
<OTHER-EXPENSES>                                           0
<LOSS-PROVISION>                                   1,813,071
<INTEREST-EXPENSE>                                 1,771,272
<INCOME-PRETAX>                                    3,443,265
<INCOME-TAX>                                       2,304,500
<INCOME-CONTINUING>                                1,138,765
<DISCONTINUED>                                             0
<EXTRAORDINARY>                                            0
<CHANGES>                                                  0
<NET-INCOME>                                       1,138,765
<EPS-BASIC>                                              0.1
<EPS-DILUTED>                                            0.1


</TABLE>