About Our Physicians Cheryl Sue Black, MD Dr. Black is from Oklahoma City, Oklahoma. She graduated with a MD degree from the University of Oklahoma in 1986. She completed residency and fellowship in endocrinology at the same institution and is qualified for the American Board of Internal Medicine and Endocrinology and Metabolism. Dr. Black is a certified user of radioisotopes. James Lowell Males, MD Dr. Males is proud to call Cheyenne Oklahoma his home. He graduated from the medical school of the University of Oklahoma in 1966 and performed his internship, residency, and fellowship in endocrinology at Duke University in North Carolina. Subsequently, he was the chief medical resident at the University of Oklahoma. He has practiced endocrinology in Oklahoma since his discharge from the US Army Medical Corps in 1974. He is certified by the boards of Internal Medicine and Endocrinology and Metabolism and is a certified user of radioisotopes. His special interests include disorders of development, pituitary and thyroid malfunction.. He is a member of the Endocrine Society and the American Thyroid Association. Dr. Males speaks German fluently. Ronald P. Painton, MD Dr. Painton grew up in Alva, Oklahoma. He graduated with a MD degree from the University of Oklahoma in 1972. He is now a clinical professor of Medicine for the University of Oklahoma. Internship, residency in medicine, chief medical residency and endocrine fellowship were completed at the University of Oklahoma. He is certified by The American Board of Internal Medicine and Endocrinology and Metabolism. Dr. Painton is a certified user of radioisotopes.