Kelsey-Seybold Clinic is Houston's premier multispecialty group practice, founded in 1949 by Dr. Mavis Kelsey in Houston's famous Texas Medical Center. More than 500 physicians and allied health professionals practice at 30 locations and an accredited Sleep Center in the Greater Houston area. Medical services offered by Kelsey-Seybold include medical care in 65 medical specialties including primary care and specialty care, outpatient surgery centers, an accredited Sleep Center, a Radiation Therapy Center, laboratory services, advanced radiology services and other diagnostic services, 15 on-site Kelsey pharmacies,