X0201 42003-12-02 0000830158 LABONE INC/ LABS 0001212995 CLARK JOHN D C/O WELSH, CARSON, ANDERSON AND STOWE 320 PARK AVENUE, SUITE 2500 NEW YORK NY 10022 0010Common Stock2003-12-024C023501028.32A2350102IBy Welsh, Carson, Anderson & Stowe IX, L.P.Series B-1 Convertible Preferred Stock8.322003-12-024C0163790D2001-08-31Common Stock23501020IBy Welsh Carson, Anderson & Stowe IX, L.P.There is no expiration date applicable to the Series B-1 Convertible Preferred Stock.The Reporting Person also directly beneficially owns 1 share of Series B-1 Convertible Preferred Stock.The Reporting Person is one of several managing members of the sole general partner of Welsh, Carson, Anderson & Stowe IX, L.P. Pursuant to Instruction (4)(b)(iv) of Form 4, the Reporting Person has elected to report as indirectly beneficially owned the entire number of securities beneficially owned by such limited partnership. The Reporting Person disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his pecuniary interest therein, and/or that are not actually distributed to him.The Reporting Person also directly beneficially owns 785 shares of Common Stock.Jonathan M. Rather, Attorney-in-Fact2003-12-03