Dr. Mary R. Oefelein is an internist in Bakersfield, California. She received her medical degree from Case Western Reserve University School of Medicine and has been in practice for more than 20 years. Dr. Mary R. Oefelein has expertise in treating Alzheimer's dementia, bursitis, among other conditions - see all areas of expertise. Dr. Mary R. Oefelein accepts Medicare, Kaiser - see other insurance plans accepted.