Diagnostic and Medical Clinic (DMC) is the largest private multi-specialty clinic in the state and has provided quality healthcare to the community for more than 70 years. Our physicians care for a wide range of specialties. Founded in 1949 by Grady Segrest, M.D., the clinic has grown over decades and continues to offer comprehensive outpatient services—including imaging, laboratory, telemedicine, and multiple specialty practices—serving Thomasville and the surrounding region.