About Us

Michael A. Duke, MD

Born and raised in Baton Rouge, Louisiana, Dr. Duke attended Centenary College in Shreveport getting his BS in Biology. He then attended medical school at Louisiana State University School of Medicine in New Orleans. Following medical school, Dr. Duke completed his Family Practice residency at MCCG in Macon, GA.

Dr. Duke and his wife, Cathy moved to Milledgeville in 1998 where he began his career as a Board Certified Family Practice Physician. He was in group practice for 18 years before opening his own practice, Sinclair Family Health, in January 2017. He and Cathy are firmly rooted in the community raising their three children, Shelby, Davis and Cameron. Dr. Duke enjoys spending time with family, singing in the choir at Milledgeville First United Methodist Church and the beach.

Dr. Duke has served for many years as Medical Advisor to both the Student Health Clinic at Georgia College and Three Rivers Home Health in Milledgeville. He has served in many capacities at our local hospital including Chair of the Department of Medicine, Chief of Staff and as a member of the Board of Directors.

Melissa Hebert, NP

Melissa is a native of Virginia and has a family nurse practitioner degree from Marymount University. She has joined Sinclair Family Health to start a new chapter with her husband Smokey and their daughter Jordan. “Empty nesting” and a desire for lake life inspired the relocation.
Melissa has been a nurse practitioner since 1997 and was with her last practice for 20 years. She especially enjoys women’s health, adolescent health, and the relationships that grow from chronic disease management. Volunteering her time for relief efforts, at local free clinics, and most recently for covid vaccination is something she plans to continue. She has found it such a fulfilling aspect of being a member of the healthcare community.
In her free time, she enjoys hiking, biking, RV camping, cooking, travelling, and spending time with her family and friends.


Since 1998, I have strived to provide the most current, compassionate and cost effective care for you and your family. You can trust us with all of your healthcare needs.

Family Oriented

Choosing a Doctor for your family can be a difficult decision. When you choose me as your family physician, you can rest assured that I will provide the best care possible for you and your loved ones


I make it a priority to listen to my patients, to understand your health concerns and address your healthcare needs. Your overall health and well being are important to me. I will always strive to address your concerns.