Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Jun 15, 1999

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Apr 13, 1999

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Mar 2, 1999

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Apr 13, 1999
TRP

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Sep 8, 1998
TOTAL RENAL PHARMACEUTICAL RESEARCH INSTITUTE

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

TRP

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Sep 1, 1998
TNCN

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Jun 23, 1998
TOTAL NEPHROLOGY CARE NETWORK

Insurance and Financial and 2 other

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Sep 1, 1998
TNCN

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Oct 13, 1998
TOTAL RENAL CARE

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.

Jun 3, 1997
TOTAL NEPHROLOGY CARE NETWORK

Computer and Scientific

Owner

TOTAL RENAL CARE HOLDINGS, INC.