Dr. John N. Mafi is an internist in Los Angeles, California and is affiliated with multiple hospitals in the area, including UCLA Medical Center and UCLA Santa Monica Medical Center. He received his medical degree from Case Western Reserve University School of Medicine and has been in practice between 11-20 years. Dr. John N. Mafi has expertise in treating hypertension, diabetes, coronary artery disease, among other conditions - see all areas of expertise. Dr. John N. Mafi accepts Medicare, Aetna, Blue Cross - see other insurance plans accepted.