Dr. Johnson, of Summerville, SC, studied biochemistry as part of the Clemson University Calhoun Honors College. Graduating summa cum laude, he proceeded to the Medical University of South Carolina where he served as Student Government Association president. He is board certified in Pediatrics and Internal Medicine following training in those disciplines at the Greenville Hospital System University Medical Center. Currently, he cares for both children and adults admitted at Greer Memorial Hospital as part of the Greenville Hospital System and looks forward to serving at Heritage Pediatrics and Internal Medicine in Wren. For almost eight years Gregg and his wife, Jeanne, have been part of the upstate and enjoy hiking the hills, spending time with the people who live here, and the many opportunities our city has to offer. As part of an international family, Gregg has interest in languages, foreign cultures and medical work abroad. His medical interests include geriatrics, healthy living, adoption medicine and travel medicine. Gregg is a member of the American Academy of Pediatrics and the American College of Physicians.