Kelsey-Seybold Clinic is Houston’s premier multispecialty group practice, founded in 1949 by Dr. Mavis Kelsey in Houston’s renowned Texas Medical Center. More than 850 physicians and allied health professionals practice at 40 locations in the Greater Houston area. Kelsey-Seybold offers quality medical care in 65 medical specialties. The organization operates the largest freestanding Ambulatory Surgery Center in Texas. It offers state-of-the-art Varian TrueBeam and Varian Edge radiation therapy technology at a nationally accredited Cancer Center.