Leadership

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Program Leadership

Welcome to the internal medicine residency program at the University of Mississippi Medical Center! The Department of Medicine is the largest department on campus and we are honored to train over 500 medical students and 100 medical residents each year. Currently, our program has 73 categorical, 7 preliminary, 3 primary care track and 16 medicine-pediatrics residents. UMMC offers fellowship training programs in all the subspecialties and our department currently has 70 fellows this academic year. We believe the many people who make up this program are our greatest asset. Thank you for visiting our site and as always, contact us if you have any questions. 

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Calvin Thigpen, MD, FACP
Associate Professor, Division of General Medicine
Program Director, Internal Medicine Residency 

Dr. Thigpen received his BS in chemistry and math in 1999 from the University of Mississippi and a BA in philosophy and psychology in 2001 from the University of Oxford in Oxford, England, where he spent two years as a Rhodes Scholar.  

Dr. Thigpen returned to Mississippi and earned his MD in 2005 from UMMC. He stayed and completed his internal medicine residency in 2008, his chief residency in 2009, and his hematology/oncology fellowship in 2012. Since joining the faculty in 2012, Dr. Thigpen has served six years as an associate program director for the categorical medicine program and has transitioned his clinical practice to general internal medicine in 2014 after initially practicing both oncology and general internal medicine for two years. 

Dr. Thigpen assumed the role of program director at the start of the 2018-19 academic year. He is the governor of the Mississippi chapter of the American College of Physicians (ACP) and completed a three-year term on the national ACP Council of Early Career Physicians in spring 2018. He enjoys spending time with his wife and three children, running, reading, and watching sports, specifically tennis, football, and cycling.

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Zeb Henson, MD
Associate Professor, Division of General Medicine
Program Director, Internal Medicine and Medicine-Pediatrics Residency

Dr. Henson is a native Mississippian and, as he likes to say, he entered UMMC in August 2001 for medical school and never left! A native of Jackson, he studied biomedical engineering at Mississippi State University prior to med school. He completed his med/peds training at UMMC in 2009, then spent one year as a chief resident in the Department of Medicine. He was brought onto the UMMC faculty following his chief year and began serving as an associate program director in the internal medicine residency program in 2010 and also the Med/Peds residency program in 2013. He became med/peds program director in 2018.

Clinically, he prefers to be as “med/peds” as he can - still working in both inpatient and outpatient clinical settings in both internal medicine and pediatrics. He has a particular interest in resistant hypertension and adolescent hypertension and was the principle investigator for the SPRINT trial at UMMC. As a native Mississippian, he has always felt called to serving his home state and his home city and volunteers at several local charities around the city.

His greatest achievement was convincing his wife, Anna, to marry him between his first and second year of medical school. They live just three miles from the hospital with their three children and one rotten dog. He can be seen running around the local neighborhoods early most mornings of the week to clear his mind and get him ready for the day. He is also active as a deacon and Sunday School teacher at his church, and he is still holding out hope of becoming a roadie for Bruce Springsteen and the E Street band one day.

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Kimberly Harkins, MD
Associate Professor, Division of General Medicine
Associate Program Director

Dr. Kimberly Harkins graduated from Mississippi College with a degree in chemistry and earned her MD from the University of Mississippi School of Medicine; while in medical school she married one of her classmates. Both matched in internal medicine at UMMC, and became the department’s first married co-chief residents. 

After residency, Dr. Harkins joined the Division of Hypertension (later merged into the Division of General Medicine and Hypertension) and served as an associate program director in the internal medicine residency, a position she holds to this day. She and her husband have three children who occupy most of her time outside the hospital. She is the treasurer of the Mississippi chapter of the American College of Physicians, leads the ambulatory curriculum, and supervises most program activities related to scheduling. The practice of medicine, solving puzzles and other problems, reading, and eating are a few of her favorite things.

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Charletta Scott-Bennet, MD
Hospitalist, VA Medical Center
Assistant Professor, Division of General Medicine
Associate Program Director

Dr. Charletta Scott-Bennett grew up in Indianola, MS, and knew she wanted to be a physician early in life. She graduated from Xavier University of Louisiana in 1995 with a degree in chemistry and earned her MD from the University of Mississippi School of Medicine in 1999. She remained at UMMC to complete her residency and then worked as a primary care physician in Vicksburg, MS, while completing her service obligation to the National Health Service Corps. In 2007, she returned to the Jackson VA Medical Center and initially served as an attending for the internal medicine resident continuity clinics and inpatient medicine wards. She is now a hospitalist at the VA and an associate program director for the internal medicine residency program.

Charletta is interested in quality improvement, health care disparities, and everything VA. She has two children and three small dogs. She enjoys watching movies, volunteering along with her kids at local charities, reading, and spending time with her family and friends. 

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Amanda Clark, MD
Assistant Professor, Division of General Medicine
Associate Program Director

A native Mississippian, Dr. Amanda Clark obtained a BS from Mississippi State University and a MD from the University of Mississippi School of Medicine. She completed residency and chief residency at the University of Alabama at Birmingham. After residency, she practiced as an academic hospitalist at the Cleveland VA Medical Center in Cleveland, Ohio, and was an associate program director for Case Western's internal medicine residency program. She and her husband, a cardiologist, decided to move “home” to Mississippi in 2017 and join the UMMC family. She serves as the director of digital technology and strategic communication for the Department of Medicine and practices inpatient and outpatient general internal medicine.

Amanda’s interests include wellness, scholarship and health care disparities. She considers it a joy and a privilege to train the physician leaders of tomorrow. She has two young children and enjoys reading and running.

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Lyssa Weatherly, MD 
Assistant Professor, Division of Geriatrics 
Associate Program Director

Dr. Lyssa Weatherly was born and raised in Mississippi. She obtained her undergraduate degree in chemistry and biology at Mississippi College. She went on to attend medical school here at UMMC, where she also completed her residency, chief residency, and geriatrics fellowship. She joined the residency program as an associate program director in 2017 with particular interest in medical student and resident education and mentorship. She is active in undergraduate medical education where she serves as co-course director for the "M2 Introduction to the Medical Profession" course as well at the "M3 Transitional Bootcamp" course. She also enjoys serving as the UMMC chapter advisor for the Gold Humanism Honor Society. Outside of medicine, Lyssa enjoys running, traveling, cheering on Ole Miss football, and spending time with her husband, Brandon. 

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Rahat Noor, MD 
Assistant Professor, Division of Hospital Medicine
Associate Program Director 

Dr. Rahat Noor is from Karachi, Pakistan, and obtained his medical degree from Aga Khan University Medical College.  He completed his internal medicine residency at William Beaumont Hospital, Royal Oak, MI. After a two-year fellowship in melanoma oncology at MD Anderson Cancer Center in Houston, TX, he went on to complete a geriatrics fellowship at the University of Texas Medical Branch, Galveston, TX. He has participated in multiple clinical trials and has several publications. He subsequently went on to practice hospital medicine at Merit Health River Region in Vicksburg, MS, before joining the UMMC family as an assistant professor in our department.

Dr. Noor assumed the role of associate program director for the internal medicine residency program in 2018 and his special interest lies in quality improvement and patient safety. In addition to his clinical and academic responsibilities, he also serves on multiple committees within the institution, including utilization review and antimicrobial stewardship. He enjoys spending time with his wife and two young children. He is an amateur when it comes to photography, playing guitar or cycling.

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Jimmy Stewart, MD
Professor, Division of General Internal Medicine
Medicine-Pediatrics Associate Program Director
Associate Dean of Graduate Medical Education 

Dr. Stewart was born and raised in Byram, MS, and obtained his undergraduate degree from Mississippi College. He attended medical school, internal medicine/pediatrics residency and chief residency in internal medicine at UMMC. He served as the program director of the med/peds residency program for 14 years until 2018 and now serves as associate dean of graduate medical education at UMMC. He is an active reviewer for the National Board of Medical Examiners and has served as president of the Mississippi chapter of the American Academy of Pediatrics. He enjoys kayaking, hiking, drawing, running and spending time with his wife and two sons.

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Michelle Horn, MD
Associate Professor, Division of General Medicine
Director of Medical Education

Dr. Michelle Horn grew up in Laurel, MS, and has stayed true to her Mississippi roots by receiving her BS degree in chemistry from Millsaps College and her MD from the University of Mississippi School of Medicine. She then completed internal medicine/pediatrics residency training at UMMC. After completing a pediatric chief resident year at UMMC, she has a dual faculty appointment in the Department of Internal Medicine and Department of Pediatrics. Her primary role is within the Division of General Internal Medicine where she enjoys caring for the primary care needs of Mississippi's citizens.

From an education leadership standpoint, she is the director of medical dducation for the Department of Internal Medicine as well as being the medical student clerkship director for third- and fourth-year medical students. She also has primary roles teaching both students and residents while attending on inpatient services for both departments as well as being the faculty mentor for both the internal medicine residency clinic and med/peds clinic.

Dr. Horn has been married to her college sweetheart for 20 years and has four children. She enjoys spending time with family and friends, exercising, and reading as well as watching movies and sports (especially her kids as well as Mississippi State Football and Dallas Cowboys Football).

Dr. Horn truly cares for the people of Mississippi and feels that one of her biggest career accomplishments is training other physicians for the state of Mississippi.