Mark Benjamin, MD Ophthalmology Specialties Ophthalmology Office Information Education Address The Loretto Hospital 645 S. Central Avenue Chicago, IL 60644 Get Directions Phone (773) 854-5475 Education: Medical School - The Chicago Medical School Internship - Mercy Hospital and Medical Center, San Diego, CA Residency - Ophthalmology - Cook County Hospital, Chicago, IL Address The Loretto Hospital 645 S. Central Avenue Chicago, IL 60644 Get Directions Phone (773) 854-5475