Passionate care. Compassionate caregivers. McKinney Celina Dr. Sohail Saeed, DO Medical Director— Internal Medicine Ashley Billmeier, CNA, CPT Certified Nursing Assistant Medical Board of Directors Dr. Sohail Saeed, DO Medical Director— Internal Medicine Dr. James L. Carlisle Medical Director— Pain Management Dr. Simon Tan Medical Director — Neurology Dr. Sohail Saeed, DO Medical Director— Internal Medicine Dr. James L. Carlisle Medical Director— Pain Management Dr. Simon Tan Medical Director — Neurology Management Team Frank Gray III President Christy Sadler Executive Director Frank Gray III President Christy Sadler Executive Director