Medicare Advantage in Williamson County, TX, for 2027.
CMS lists 64 Medicare Advantage plans here for 2027, 8 fewer than 2026 (72). 49,878 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
11 plans with members in the county end or leave it, plus 114 with 10 or fewer members here. CMS moves 2,416 members to another plan, and 30,451 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Wellcare Giveback (HMO) | Centene | 323 | Plan terminated |
| Blue Cross Medicare Advantage Choice Premier (PPO) | Health Care Service | 228 | Plan terminated |
| Blue Cross Medicare Advantage Secure (HMO) | Health Care Service | 176 | Plan terminated |
| Wellcare Dual Access (HMO D-SNP) | Centene | 115 | Plan leaves this county |
| Blue Cross Medicare Advantage Optimum (PPO) | Health Care Service | 109 | Plan terminated |
| Blue Cross Medicare Advantage Dental Value (HMO) | Health Care Service | 95 | Plan terminated |
| Wellcare Dual Liberty (HMO D-SNP) | Centene | 83 | Plan leaves this county |
| Aetna Medicare Full Dual Care (HMO D-SNP) | CVS Health | 36 | Plan leaves this county |
| UHC Complete Care Support TX-1A (Regional PPO C-SNP) | UnitedHealth | 25 | Plan terminated |
| Aetna Medicare Signature (PPO) | CVS Health | 15 | Plan leaves this county |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| UHC Dual Complete TX-S003 (HMO-POS D-SNP) | UHC Dual Complete TX-S6 (HMO-POS D-SNP) | 1,180 |
| UHC Dual Complete TX-D002 (HMO-POS D-SNP) | UHC Dual Complete TX-Q6 (HMO-POS D-SNP) | 863 |
| UHC Dual Complete TX-V002 (HMO-POS D-SNP) | UHC Dual Complete TX-Q6 (HMO-POS D-SNP) | 159 |
| Humana USAA Honor Giveback (PPO) | Humana USAA Honor Giveback (PPO) | 134 |
| BSW SeniorCare Advantage Essentials (HMO-POS) | BSW SeniorCare Advantage Select Rx (HMO-POS) | 80 |
| Wellpoint Dual Advantage 2 (HMO D-SNP) | Wellpoint Full Dual Advantage (HMO D-SNP) | 10 or fewer |
| UHC Dual Complete TX-D003 (HMO-POS D-SNP) | UHC Dual Complete TX-Q6 (HMO-POS D-SNP) | 10 or fewer |
| UHC Dual Complete TX-D007 (HMO-POS D-SNP) | UHC Dual Complete TX-Q6 (HMO-POS D-SNP) | 10 or fewer |
Who holds the members
- UnitedHealth23,255
- Humana13,864
- Baylor Scott & White Health4,504
- CVS Health3,076
- Health Care Service2,623
- Devoted Health1,503
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- UHC Nursing Home Plan TX-F001 (PPO I-SNP)UnitedHealth5.0
- BSW SeniorCare Advantage Preferred (HMO-POS)Baylor Scott & White Health4.5
- BSW SeniorCare Advantage Preferred Rx (HMO-POS)Baylor Scott & White Health4.5
- BSW SeniorCare Advantage Premium (HMO-POS)Baylor Scott & White Health4.5
- BSW SeniorCare Advantage Premium Rx (HMO-POS)Baylor Scott & White Health4.5
- BSW SeniorCare Advantage Select (HMO-POS)Baylor Scott & White Health4.5
- BSW SeniorCare Advantage Select Rx (HMO-POS)Baylor Scott & White Health4.5
- DEVOTED C-SNP ENHANCED 023 TX (HMO C-SNP)Devoted Health4.5
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 64 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 Texas 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.