Pacific Health Care Organization, Inc., together with its subsidiaries, operates as a workers' compensation cost containment company in the United States. It is involved in managing and administering health care organizations (HCOs) and medical provider networks (MPNs). The company also provides utilization review, medical case management, nurse case management, medical bill review, employee advocate, expert witness testimony, and Medicare set-aside services, as well as workers' compensation carve-outs. It serves insurers, third party administrators, self-administered employers, municipalities, and other industries. The company was formerly known as Clear Air, Inc. and changed its name to Pacific Health Care Organization, Inc. in January 2001. Pacific Health Care Organization, Inc. was incorporated in 1970 and is based in Irvine, California.