His hospital/clinic affiliations include Bryn Mawr Hospital, Nazareth Hospital, and Rothman Institute. After completing medical school at Philadelphia College of Osteopathic Medicine, he performed his residency at a hospital affiliated with the University of Washington. Dr. Greis has received a 4.5 out of 5 star rating by his patients. He takes Coventry, United Healthcare HSA, United Healthcare HMO, and more. He has an open panel.