Back to Find a Doctor Penelope Barker, DO Penelope Barker, DO Specialties: Internal MedicineGeriatric Medicine Hospital Privileges: Ascension St. John Hospital Medical Education: Des Moines University - Osteopathic Medical Center Board Certification: AOA Board of Internal Medicine - Geriatric Medicine Profile: Dr. Barker is a specialist in Internal Medicine. She is board certified in both Internal Medicine and Geriatric Medicine. She has been honored as a fellow by the American College of Osteopathic Internists. She serves as a board member of The Holley Institute and a member of the St. John Fontbonne Auxiliary. Her practice interests include wellness, nutrition and preventive medicine.Licensed in the State of Florida to provide telehealth services to his/her patients. Visit the following link for the Florida Telehealth Statute. https://flhealthsource.gov/telehealth/