Richard C. Johnston

American Medical Group Association (AMGA) is a trade association that represents multispecialty medical groups and integrated systems of care. The non-profit company is based in Alexandria, VA and has subsidiaries in the United States. The company provides learning vehicles for sharing healthcare best practices in managing patients with chronic diseases. AMGA advocates, educates, innovates, and empowers its members to transform healthcare in the United States. The company was founded in 1950, and the CEO is Jerry Penso.

USMD, Inc. provides healthcare services. It offers acute care, specialty surgical hospitals, ambulatory surgery and radiation therapy treatment centers and lithotripsy services. The company was founded by John M. House in November 2006 and is headquartered in Irving, TX.

The Medical Clinic of North Texas PLLC offers expert medical care services in the areas of family medicine, internal medicine, obstetrics and gynecology, pediatrics, allergy and immunology, cardiology, gastroenterology, general surgery, geriatrics, infectious disease, interventional pain management, medical oncology, neurology, physical medicine and rehabilitation, psychotherapy, podiatry, rheumatology, sports medicine, travel medicine and diabetes education. The company was founded in 1995 and is headquartered in Hurst, TX.

The Medical Clinic of North Texas PLLC offers expert medical care services in the areas of family medicine, internal medicine, obstetrics and gynecology, pediatrics, allergy and immunology, cardiology, gastroenterology, general surgery, geriatrics, infectious disease, interventional pain management, medical oncology, neurology, physical medicine and rehabilitation, psychotherapy, podiatry, rheumatology, sports medicine, travel medicine and diabetes education. The company was founded in 1995 and is headquartered in Hurst, TX.

Columbia Medical Center of Las Colinas, Inc. provides healthcare services. It offers cardiovascular, imaging, surgical, neurology and stroke, oncology, acute care, emergency, and rehabilitation services. The company was founded in 1997 and is headquartered in Irving, TX.