He attended Weill Cornell Medical College for medical school and subsequently trained at New York-Presbyterian Hospital and a hospital affiliated with Weill Cornell Medical College for residency. Areas of expertise for Dr. Markus include cancer and blood disorders. He has a 4.5 out of 5 star average patient rating. Dr. Markus takes several insurance carriers, including Humana HMO, Humana Bronze, and Humana Catastrophic. His hospital/clinic affiliations include Centura Health and the University of Colorado Health (UCHealth).