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Our Team

Titus D. Duncan, M.D., F.A.C.S.
Bariatric Surgeon

Dr Titus DuncanDr. Titus D. Duncan is a pioneer in laparoscopic surgery.  He is one of the first surgeons in the U.S. to successfully perform an endoscopic transaxillary approach to remove the thyroid and parathyroid gland. He has made numerous national and international presentations and has published extensively on topics related to minimally invasive surgery. 

Dr. Duncan is a graduate of University of Oklahoma School of Medicine and completed his residency training at Georgia Baptist Medical Center. He has practiced general surgery since 1983, and is a board certified general surgeon and fellow of the American College of Surgeons.  He is an Associate Professor of Surgery and Director of Minimally Invasive & Bariatric Surgery at Atlanta Medical Center and Morehouse School of Medicine. He has taught minimally invasive and laparoscopic techniques to surgeons in the U.S. and abroad.

Dr. Duncan is the health news reporter for Fox 5’s Housecall segment on “Good Day Atlanta.”
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Clarence R. Hixon, M.D., F.A.C.S.
Bariatric Surgeon

Dr HixonDr. Clarence Roy Hixon has been a board certified surgeon since 1995.
He attended Morehouse College and earned his medical degree from Meharry Medical College in Nashville, TN. Dr. Hixon completed his surgical training at St. Joseph Mercy Hospital and went on to complete his internship and surgical residency there. After completing a fellowship in colon and rectal surgery at the University of Texas Southwestern Parkland Memorial Hospital, he moved back to Atlanta, where he did his post-graduate training at Grady Memorial Hospital in advanced trauma life support.
He has previously taught at Morehouse School of Medicine, serving as the Clinical Instructor of Surgery, the Clerkship Director of Surgical Education and Assistant Professor of Surgery.

He has professional memberships with the American College of Surgeons, American Society for Bariatric Surgery, National Medical Association, and Parkland Surgical Society. Some of his publications include: “Management of Hepatic Metastasis in Colorectal Carcinoma: Current Surgery” and “Colon Carcinoma in the African-American Population.”

Dr. Hixon opened his private practice in 1999, and he specializes in colon and rectal, bariatric, pediatric and general surgery. He is married and with two sons and lives in Southwest Atlanta.

Larry L. Hobson, M.D., F.A.C.S.
Bariatric Surgeon

Dr. Larry HobsonDr. Larry L. Hobson is a member of the Medical Executive Committee and is the former chairman of the Department of Surgery for Atlanta Medical Center. He earned a bachelor’s degree in chemistry and biology from Carson-Newman College in Jefferson City, TN, and is a graduate of Meharry Medical College in Nashville, TN. He completed his internship and residency training at Emory University School of Medicine.

Karleena R. Tuggle, M.D., F.A.C.S.
Bariatric Surgeon

Dr Karleena TuggleDr. Karleena Tuggle was born and raised in Long Island, NY. She earned a bachelor’s of science degree in biology from University of Maryland, Baltimore. She earned her medical doctorate from Howard University College of Medicine and also completed her internship and residency in general surgery there.

She moved to Atlanta in 2011, where she completed a fellowship in minimally invasive and bariatric surgery with Peachtree Surgical and Bariatrics.

Christina Maffiola, RD, LD
Registered Dietitian

Christina MaffiolaChristina Maffiola is a registered dietitian whose goal is to help individuals reach their dietary and exercise goals by promoting a healthy, well-balanced lifestyle. Christina received her bachelor’s degree in Food, Nutrition, and Dietetics from Illinois State University. She completed her dietetic internship with an emphasis in Wellness at Bradley University. Her nutrition areas of interest include weight management, bariatric nutrition, and diabetes management.

Sue Wood, RN, CBN
Bariatric Program Coordinator

Sue Wood, RN, CBNSue Wood has worked in the field of bariatric surgery for 12 years. Her experience as a veteran bariatric surgery patient provides a unique prospective in her ability to teach others what it takes to be successful in the long-term.

Sue earned a nursing degree from Kennesaw State University. With a background in healthcare administration, nursing, and clinical drug research, she has developed numerous avenues of support during her career as a bariatric program leader. Her support group leadership earned her an award as 2010 Bariatric Care Network Professional of the Year. She continues to be a leader in innovation, establishing interactive live support groups, creating content for monthly newsletters, running telephonic support group meetings and writing weekly blogs about her specialty. With a passion for teaching, as well as a love of people and medicine, she also mentors other nurses entering bariatric medicine.

For more information on these and other physicians on the medical staff at WellStar Atlanta Medical Center, call our physician referral number at 770-956-STAR (7827).