Our Doctors All three of our doctors, Drs. Jeffrey Caren, Arash Nayeri and Mark Urman are board-certified cardiologists, who are medical-staff members of the world-renowned Cedars-Sinai Smidt Heart Institute. Dr. Jeffrey Caren Learn about Dr. Caren Dr. Mark Urman Learn about Dr. Urman DR. ARASH NAYERI Learn about Dr. Nayeri