Michelle M. Horn, MD
Specialties: Internal Medicine, Med/Peds General
Gender: Female
Biography: Growing up in small town Mississippi, I never dreamed I would be doing what I do today. As a child, I remember playing school and wanting to be a teacher. Now I get to educate future physicians while also caring for the people of Mississippi from the very young to the geriatrics population and all patients in between both in the inpatient and ambulatory settings. In my role as an educator here at UMMC, one of my greatest joys is getting to teach medical students and residents and be a part of their paths to becoming the future physicians that care for the people of Mississippi!
My Approach to Healthcare
“As a physician in Internal Medicine-Pediatrics, I am able to see patients from infancy through childhood and adolescence and in to adulthood. The main focus of my own practice is the primary care of adults; however, I am actively involved in the care of patients of all ages with our Med-Peds residents in their continuity clinic. In a partnered approach, I develop treatment plans with my patients for their chronic diseases while also focusing on elements related to their healthcare maintenance. I believe that having open communication with my patients develops a relationship that enhances their attitude towards their health.”
Practice Locations
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1
Grants Ferry - UMMC
1010 Lakeland Place, Flowood, MS 39232 View Location |
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2
UMMC Colony Park South
326 Commerce Center Drive, Ridgeland, MS 39157 View Location |
Accepted Insurance Plans
The University of Mississippi Medical Center accepts all plans, but may not be an in-network provider with your plan. We encourage you to contact your insurer and ask if the plan is in network with UMMC. Always contact your insurance carrier for specific coverage information.
Network Participation - 2026
MississippiCAN and CHIP [Managed Care programs promulgated by the Mississippi Division of Medicaid]
- Molina Healthcare of Mississippi, Inc.
- Magnolia Health (Centene)
- TrueCare
Affordable Care Act (ACA) Marketplace [Individual plans offered on healthcare.gov]
- Ambetter from Magnolia Health (Centene)
- Molina Healthcare of Mississippi, Inc.
- UHC Marketplace (Madison only)
Medicare Advantage
- Devoted Health Plans: PPO, HMO, DSNP, CSNP
- HealthSpring Plans: PPO, HMO, DSNP
- Humana: PPO, HMO, DSNP, CSNP, ISNP
- United Healthcare Plans: PPO, HMO, DSNP, CSNP, ISNP
- WellCare (Centene) Plans: PPO, HMO, DSNP
Commercial - Group and Individual
- Aetna Plans: PPO, HMO [Includes all facilities except UMMC Madison]
- BCBSMS Plans: BlueCardPPO, State Health Plan (AHS), Federal Employee Plan (FEP)
- Cigna Plans: PPO, HMO
- United Healthcare Plans: PPO, HMO (Includes plans administered by UMR, UnitedHealth Group's wholly owned third-party administrator (TPA) subsidiary)
Transplant Only Networks
- Optum Plan: Commercial • Programs: Solid Organ, BMT, VAD
- Emerging Therapy Solutions (ETS) Plan: Commercial • Programs: Solid Organ, BMT, CAR-T, VAD
- Interlink Plan: Commercial • Programs: Solid Organ, BMT, CAR-T
- Celtic Plans: Ambetter, WellCare, Magnolia Health MississippiCAN, Magnolia Health CHIP • Programs: Solid Organ, BMT
- Cigna Lifesource Plan: Commercial • Programs: Solid Organ, BMT, CAR-T, VAD
Dental
- Avesis Plan: MississippiCAN and CHIP (TrueCare)
- Always Care/Unum Plan: Commercial
Vision
- Avesis Plan: MississippiCAN and CHIP (TrueCare)
- Always Care/Unum Plan: Commercial
Rental Networks (Utilized by self-funded employer group plans and third-party administrators (TPAs))
- Mississippi Physicians Care Network (MPCN) [If MPCN is present on a Member/Subscriber ID, all UMMC facilities and providers are in-network regardless of TPA.]
- First Choice Health Plan
- Claritev (formerly Multiplan)
- Zelis
Government Programs
- Humana Military Plan: Tricare
- United Healthcare Plan: Veterans Affairs Community Care Networks
Plans and Payors UMMC is not in-network with as of April 1, 2026
- Oscar Health Plan: ACA Marketplace [Final negotiations taking place now. Anticipate in-network participation, effective June 1, 2026.]
- Cigna (Connect EPO) Plan: ACA Marketplace
- American Health Advantage Plan: Medicare Advantage
- Patrius Health (BCBSMS) Plan: Medicare Advantage
- Aetna Plan: Medicare Advantage
Education
| Board Certification: | Internal Medicine; Pediatrics |
| Internship: | University of Mississippi Medical Center |
| Medical Education: | University of Mississippi School of Medicine |
| Residency: | University of Mississippi Medical Center |
Experience
Current Positions
| Professor, School of Medicine, Department of Pediatrics, UMMC | 07/2022 - Present |
| Professor, School of Medicine, Department of Medicine, UMMC | 07/2022 - Present |
| Division Director, School of Medicine, Department of Medicine, UMMC | 2021 - Present |
| Program Director of Student Education, School of Medicine, Department of Medicine, UMMC | 07/2019 - Present |
| Co-Course Director, M4 Transition to Residency Boot Camp, School of Medicine, UMMC | 07/2019 - Present |
| Course Director of M4 Sub-Internship, School of Medicine, Department of Medicine, University of Mississippi Medical Center | 07/2007 - Present |
| Course Director M4 Ambulatory Medicine, School of Medicine, Department of Medicine, University of Mississippi Medical Center | 07/2007 - Present |
Specialty Certification Licensure
| Licensure, State Medical License, Mississippi State Board of Medical Licensure | 07/2005 - Present |
| Certification, Internal Medicine, American Board of Internal Medicine | 2005 - Present |
| Certification, Pediatrics, American Board of Pediatrics | 2005 - Present |
Honors, Awards, and Recognition
| Mentoring Award, Department of Medicine | 2022 |
| Faculty Induction, Alpha Mississippi Chapter of Alpha Omega Alpha Honor Society | 2021 |
| Trailblazer Teaching Award, Office of Medical Education, University of Mississippi School of Medicine | 2021 |
| Carl G Evers, Society M4 All-Star Attending of the Year 2017, Carl G. Evers Society | 2017 |
| Patient Satisfaction Award, Wellcare Health Plans | 2016 |
| Best Doctors 2011-2012, Best Doctors | 2011 |
| Norman C. Nelson Order, University of Ms School of Medicine | 2011 |
| Chief Resident, Department of Pediatrics | 2005 |
| Medical Records Perfect Attendance, Department of Internal Medicine | 2005 |
| Medical Records Perfect Attendance, Department of Pediatrics | 2005 |
| Summa cum laude, Millsaps College | 1997 |
| Phi Beta Kappa, Millsaps College | 1997 |