Exhibit 21.1

SUBSIDIARIES

NAME	STATE OF INCORPORATION
Beech Street Corporation	California
Beech Street Corporation	Delaware
BestCare, Inc.	Louisiana
CM Occupational Health, Limited Liability Company	Maine
Concentra Akron, L.L.C.	Delaware
Concentra Arkansas, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra Birmingham, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra Health Services, Inc. (doing business as Concentra Medical Centers)	Nevada
Concentra Integrated Services, Inc.	Massachusetts
Concentra Laboratory, L.L.C. (doing business as Advanced Toxicology Network)	Delaware
Concentra Management Services, Inc.	Nevada
Concentra Network Services, Inc.	Nevada
Concentra Occupational Healthcare Harrisburg, L.P. (doing business as Concentra Medical Centers)	Pennsylvania
Concentra Preferred Systems, Inc.	Delaware
Concentra St. Louis, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra Services, Inc.	Nevada
Concentra South Carolina, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra-UPMC, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra Vanderbilt, L.L.C. (doing business as Concentra Medical Centers)	Delaware
Concentra Winston-Salem, L.L.C. (doing business as Concentra Medical Centers)	Delaware
CPS Business Corporation	Delaware
FHM Business Corporation	Delaware
First Script Network Services, Inc.	Nevada
FOCUS Healthcare Management, Inc.	Tennessee
Healthcare Network Services Corporation	Delaware
HealthNetwork Systems LLC	Delaware
Kent/OH+R, LLC	Rhode Island
Managed Prescription Program	Arizona
MetraComp, Inc.	Connecticut
National Healthcare Resources, Inc.	Delaware
OccuCenters I, L.P. (doing business as Concentra Medical Centers; Concentra)	Texas
Occupational Health + Rehabilitation LLC	Delaware
Occupational Health Ventures, L.L.C. (doing business as Concentra Medical Centers)	Pennsylvania
OCI Holdings, Inc.	Nevada
OHC of Oklahoma, L.L.C. (doing business as Concentra Medical Centers)	Oklahoma
OHR/Baystate, LLC	Massachusetts
OHR/MMC, Limited Liability Company	Maine
OMP Insurance Company, Ltd.	Cayman Islands