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Dr. Ronald Colman, MD is a Gastroenterology Specialist in Houston, TX. Dr. Colman has more experience with Esophageal Disorders, Anal & Rectal Disorders, and Gastrointestinal Disorders than other specialists in his area. He is affiliated with medical facilities HCA Houston Healthcare Medical Center and Houston Methodist Hospital. He is accepting new patients. Be sure to call ahead with Dr. Colman to book an appointment.