Dr. Jonathan D. Frank is an internist in Walnut Creek, California and is affiliated with multiple hospitals in the area, including John Muir Health-Walnut Creek Medical Center and John Muir Health-Concord Medical Center. He received his medical degree from Perelman School of Medicine at the University of Pennsylvania and has been in practice for more than 20 years. Dr. Jonathan D. Frank has expertise in treating heart failure, hypertension & high blood pressure, diabetes, among other conditions - see all areas of expertise. Dr. Jonathan D. Frank accepts Aetna, Humana, Blue Cross, United Healthcare - see other insurance plans accepted.