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Katharine T. Gregg, MD
Specialties: Geriatrics, Alzheimer's and Dementia
Gender: Female
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, Geriatric Medicine |
| Fellowship: | Johns Hopkins Hospital |
| Internship: | University of Mississippi School of Medicine |
| Residency: | University of Mississippi School of Medicine |
Experience
Current Positions
| Associate Professor, School of Medicine, Department of Medicine, University of Mississippi Medical Center | 2004 - Present |
Specialty Certification Licensure
| Re-certification, Diplomate in Geriatic Medicine, American Board of Internal Medicine | 2008 - 12/2018 |
| Re-certification, American Board of Internal Medicine, American Board of Internal Medicine | 2007 - 12/2017 |
| Licensure, Mississippi Medical Licensure, Mississippi State Board of Medical Licensure | 1995 - 06/2019 |
| Certification, Diplomate in Geriatirc Medicine | 1999 - 2009 |
| Certification, American Board of Internal Medicine | 1997 - 2007 |
Honors, Awards, and Recognition
| Alpha Epsilon Delta, Univeristy of the South | 1988 |
| Omicron Delta Kappa, University of the South | 1988 |
| Order of the Gownsmen, University of the South | 1987 |
| Georgia M. Wilkins Memorial Scholar, University of the South | 1986 |
| Teaching Excellence Award, Department of Medicine | |
| Wellcome Leadership Award, AMA/Glaxo | |
| Honorable Mention, Mississippi Chapter of the American College of Physicians Annual Associates Program | |
| Phi Beta Kappa, University of the South | |
| The Harry C. Yeatman Award in Biology, University of the South |