Pacific Health Care Organization, Inc., together with its subsidiaries, operates as a specialty 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 claims-related services, including utilization review, medical case management, medical bill review, employee advocate services, workers' compensation carve-outs, expert witness testimony, and Medicare set-aside services. 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.