View All Insurance Specialties. Primary: Rheumatologist (Joints & Arthritis Specialist) Sub-Specialty: General Additional Specialties: D Ahmed has practice at 2 locations 1 cumming GA 4730 Hammond In austral Dr STE 400 CUMMING GA 30041, MONDAY , TUESDAY, WEDNESDAY, THURSDAY HALF DAY 2 2443 Brookstone Centre Pkwy STE A Columbus GA 31904 FRIDA AND SATURDAY ONLY, Rheumatology.