Dr Khan was raised in Pakistan. He is a graduate of Allama Iqbal Medical College in Pakistan. He completed his residency for Internal Medicine at Nassau University Medical Center in East Meadow, New York. From there he became an Internist at Artesia General Hospital in Artesia, New Mexico for 4 years. He then did his fellowship in Endocrinology at the University of Oklahoma Health Science Center. Upon completion of his training he joined the physicians at the Endocrine Group, LLP. He is board certified in Endocrinology and also licensed to use radioisotopes.

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.

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.

Dr. Smith is a specialist in the field of Endocrinology Medicine. He graduated from Wake Forest University School of Medicine. He also completed his fellowship in Endocrinology at Wake Forest University. Upon completion of his training he joined the faculty at Cornerstone Endocrinology and remained there until December of 2010. In January of 2011, Dr. Smith joined The Endocrine Group, LLP. He is a board certified Endocrinologist and is also licensed to use radioisotopes.