On average, patients gave him a rating of 2.5 stars out of 5. Dr. Keller's professional affiliations include Parham Doctors Hospital, Chippenham Hospital, and Johnston-Willis Hospital. He honors Medicare insurance. Before performing his residency at Norwalk Hospital, Dr. Keller attended St. George's University School of Medicine. He has received distinctions including Washington, DC-Baltimore-Northern Virginia Super Doctors and Washington, DC/Baltimore/Northern Virginia Super Doctors.