Dr. Ann L. Gerhardt is an internist in Sacramento, California and is affiliated with Sutter Medical Center-Sacramento. She received her medical degree from Case Western Reserve University School of Medicine and has been in practice for more than 20 years. Dr. Ann L. Gerhardt has expertise in treating kidney disease, hypertension & high blood pressure, diabetes, among other conditions - see all areas of expertise. Dr. Ann L. Gerhardt accepts Medicare, Aetna - see other insurance plans accepted.