Medicare Advantage in Williamson County, TN, for 2027.
CMS lists 71 Medicare Advantage plans here for 2027, 3 fewer than 2026 (74). 19,056 people in the county had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 plan file (October 2026 release), CMS CY2026 plan file (September 2026 release), CMS enrollment by county (CPSC), October 2026, CMS 2027 Plan Crosswalk (October 1, 2026), CMS 2027 Star Ratings Data Tables (October 8, 2026). Member counts are floors because CMS hides counts of 10 or fewer.
The county in numbers
Plans that end here for 2027
5 plans with members in the county end or leave it, plus 68 with 10 or fewer members here. CMS moves 400 members to another plan, and 13,785 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Humana Value Choice H5216-451 (PPO) | Humana | 425 | Plan terminated |
| HumanaChoice H5216-450 (PPO) | Humana | 89 | Plan terminated |
| Wellcare Simple (HMO-POS) | Centene | 86 | Plan terminated |
| Wellcare Giveback (HMO-POS) | Centene | 27 | Plan terminated |
| HumanaChoice H5216-449 (PPO) | Humana | 13 | Plan terminated |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| UHC Dual Complete TN-S001 (HMO-POS D-SNP) | UHC Dual Complete TN-Q1 (HMO-POS D-SNP) | 213 |
| UHC Dual Complete TN-Y2 (HMO-POS D-SNP) | UHC Dual Complete TN-YL (HMO-POS D-SNP) | 187 |
Who holds the members
- Health Care Service6,128
- UnitedHealth4,496
- BlueCross BlueShield of Tennessee3,831
- Humana2,515
- CVS Health1,194
- Elevance Health413
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- DEVOTED C-SNP CHOICE ENHANCED 029 TN (PPO C-SNP)Devoted Health4.5
- DEVOTED C-SNP CHOICE GIVEBACK EXTRAS 034 TN (PPO C-SNP)Devoted Health4.5
- DEVOTED C-SNP CHOICE PLUS 031 TN (PPO C-SNP)Devoted Health4.5
- DEVOTED CHOICE 026 TN (PPO)Devoted Health4.5
- DEVOTED CHOICE GIVEBACK 020 TN (PPO)Devoted Health4.5
- DEVOTED CHOICE GIVEBACK EXTRAS 042 TN (PPO)Devoted Health4.5
- Humana Dual QMB Only (HMO D-SNP)Humana4.5
- Humana Essentials Plus Giveback (HMO)Humana4.5
2027 overall Star Rating, 4.5 or more. Each plan's measure stars are in the county lookup.
See every plan, premium and copay in the free lookup.
Sort all 71 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open Williamson in the lookupWorking this county for AEP?
The AEP 2027 County Kit puts this county and your others in one file: the plans that end, where members land, what is still sold and a crosswalk sheet, with every number tied to its CMS file.
See the AEP 2027 County KitAll Tennessee county pages. Facts from public CMS files, prepared by Health and Tech Now. Not plan advice. Check a plan's Summary of Benefits before you enroll.