John Petersen,  DO Office Locations 4800 Belfort Rd. Jacksonville, FL 32256 Click here to view map to Office           Telephone (904) 398-7205 Fax (904) 396-4047 Gender         Languages Spoken Male English Hospital Affiliation Baptist Downtown Baptist Beaches Specialty Gastroenterology - Board Certified Internal Medicine - Board Certified Education Doctor of Osteopathy Chicago Osteopathic Medical Center Internship Doctor's Hospital Residency Cleveland Clinic Fellowship Yale University