Su Zan Nelson

Concentra, Inc. engages in the provision of healthcare solutions. It offers occupational health, physical therapy, health and wellness, physical exams, urgent care, and tests and screening services. The company was founded by Lois E. Silverman and John K. Carlyle in 1979 and is headquartered in Addison, TX.

Concentra Operating Corp. was a health care company, which focused on improving America’s health, one patient at a time. It offered specialized therapy treatment and an early intervention approach that focused on returning employees to life, work, and normal functioning. The company was founded in 1979 and was headquartered in Austin, TX.

United Surgical Partners International, Inc. owns and manages ambulatory surgical facilities. It operates short-stay surgical facilities which are licensed as ambulatory surgery centers, specialty hospitals, and hospitals. The company was founded by Donald Steen in February 1998 and is headquartered in Addison, TX.

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