Joseph P. Hymes

Anesthesia Associates of Ann Arbor Pllc provides physician anesthesia coverage services for healthcare providers and systems. Its services include anesthesiology, critical care, office based anesthesia, pain and perioperative management services. The company was founded by Ed Krigbaum and George Chatas in 1968 and is headquartered in Ann Arbor, MI.

Concentra Health Services, Inc. provides workers occupational healthcare services. It also offers workers compensation injury and non-injury occupational healthcare services. The company's health services include occupational physical examinations, drug and alcohol testing, functional capacity testing, and other related programs. It was founded in 1979 and is located in Addison, TX

BH Resolution Corp., Inc. provides healthcare services. The company is based in Ann Arbor, MI. BH Resolution Corp. was acquired by Concentra Health Services, Inc. on August 17, 2007.