Dr. Mark Willis is an ENT-otolaryngologist in Highlands Ranch, Colorado and is affiliated with multiple hospitals in the area, including UCHealth University of Colorado Hospital and UCHealth Highlands Ranch Hospital. He received his medical degree from University of Colorado School of Medicine and has been in practice between 11-20 years. Dr. Mark Willis accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.