Physicians and Staff

Duke Weight Loss Surgery brings together surgeons, nutritionists, psychologists, and a support staff committed to helping you achieve your weight-loss goals and ensure a safe and successful pre- and postoperative experience.

Click a name to learn more about a physician, nurse, program coordinator, or insurance specialist who offers weight loss surgery services.

Katherine L. Applegate, PhD

• Psychiatry and Behavioral Sciences / Medical Psychology

Appointment Telephone: 919-470-7000

Eric J. DeMaria, MD

• Surgery / General Surgery

Appointment Telephone: 866-637-0711

Kelli E. Friedman, PhD

• Psychiatry and Behavioral Sciences / Medical Psychology

Appointment Telephone: 919-470-7000

Dana D. Portenier, MD

• Surgery / General Surgery

Appointment Telephone: 866-637-0711

Aurora D. Pryor, MD

• Surgery / General Surgery

Appointment Telephone: 866-637-0711

Ranjan Sudan, MD

• Surgery / General Surgery

Appointment Telephone: 866-637-0711

Alfonso Torquati, MD, MSci

• Surgery / General Surgery

Appointment Telephone: 866-637-0711

Nutritionist

• Patrick Mahaney, RD, LDN
• Elizabeth Keenan, RD

Nurse Practitioners

• Hilary Blackwood, NP

Nurses

• Mary Whitman, RN, Bariatric Program Coordinator, Durham Regional Hospital
• Lisa Prestia, RN, Nurse Manager, Duke Center for Metabolic and Weight Loss Surgery
• Barbara Parker, MLPN

Anesthesiologists

• Edward G. Sanders, MD
• Ruth E. Long, CRNA