Dr. I-wen Chang

Joel Isom, MD, is a board-certified internal medicine physician serving patients at CommunityMD in Atlanta and Newnan, Georgia. He is passionate about treating and caring for his patients. Dr. Isom’s journey began with a desire to become a veterinarian. However, as he experienced how disease was affecting his family, he found his passion for improving the health and wellness of people. He graduated from Meharry Medical College in Nashville, Tennessee, and completed his residency and training in the Meharry Internal Medicine Program. Dr. Isom embraces innovation in the practice of internal medicine. He values reaching the health and wellness goals of his patients. He pursues the process of identifying their needs and developing plans for patient wellness. Seeing his patients smile when together they have discovered what treatments have been most effective brings him a sense of satisfaction. Dr. Isom is from Thomson, Georgia, and moved to Atlanta to be closer to his family. He loves spending time with his wife, Dr. Erica Isom, who is also an internist. They enjoy going on vacation with their three children. He also enjoys Fantasy Football and a good laugh with the 90s sitcom Martin. Dr. Isom is rated as an Advanced provider by MediFind in the treatment of Febrile Neutropenia. His top areas of expertise are Type 2 Diabetes (T2D), Hypertension, Familial Hypertension, and Vitamin D Deficiency.

Robert Barrett is a primary care provider, practicing in Internal Medicine in Gainesville, Georgia. Dr. Barrett is rated as a Distinguished provider by MediFind in the treatment of Febrile Neutropenia. His top areas of expertise are Infant Hyperglycemia, Macroamylasemia, Familial Hypertriglyceridemia, and High Cholesterol. Dr. Barrett is currently accepting new patients.

Carolyn H. Sigman, M.D., graduated with her bachelor's degree from Franklin and Marshall College in Lancaster, Pennsylvania. She earned her medical degree at Jefferson Medical College in Philadelphia. She then completed her internship and residency in internal medicine at Emory University. Following that, she served as chief resident at Emory University Hospital. Prior to joining Piedmont Physicians, Dr. Sigman was in private practice in Roswell and Alpharetta. With more than twenty years of experience, she is board certified in internal medicine and a member of the American College of Physicians. Dr. Sigman lives in Brookhaven with her husband, Steven Sigman, M.D., and their five children. Dr. Sigman welcomes new patients and accepts most insurance plans. Dr. Sigman is rated as an Advanced provider by MediFind in the treatment of Febrile Neutropenia. Her top areas of expertise are Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Hypertension, and Sitosterolemia.