Dr. Ennis has indicated that his clinical interests include diabetic foot ulcers, pressure ulcers (bedsores), and vasculitis. He is affiliated with the University of Illinois Hospital & Health Sciences System (UI Health) and Little Company of Mary Hospital. He is a graduate of New York College of Osteopathic Medicine. His training includes residency programs at Largo Medical Center and a hospital affiliated with Midwestern University. Dr. Ennis honors several insurance carriers, including Humana HMO, Humana Bronze, and Humana Catastrophic.