Medicare Advantage in Jefferson County, CO, for 2027.
CMS lists 65 Medicare Advantage plans here for 2027, 7 fewer than 2026 (72). 75,922 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
9 plans with members in the county end or leave it, plus 100 with 10 or fewer members here. CMS moves 1,194 members to another plan, and 60,382 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Aetna Medicare Signature (HMO-POS) | CVS Health | 512 | Plan terminated |
| Kaiser Permanente Senior Advantage Choice DM (PPO) | Kaiser Foundation Health Plan | 200 | Plan terminated |
| HealthSpring Preferred (HMO) | Health Care Service | 148 | Plan terminated |
| Humana Full Access H5216-333 (PPO) | Humana | 110 | Plan terminated |
| Select Health Medicare + Kroger (HMO) | Intermountain Health Care | 108 | Plan terminated |
| Aetna Medicare Signature (HMO-POS) | CVS Health | 80 | Plan terminated |
| Aetna Medicare Dual Care (HMO D-SNP) | CVS Health | 60 | Plan terminated |
| Select Health Medicare Flex (HMO) | Intermountain Health Care | 46 | Plan terminated |
| Select Health Medicare Active (HMO) | Intermountain Health Care | 17 | Plan terminated |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| UHC Dual Complete CO-S4 (HMO-POS D-SNP) | UHC Dual Complete CO-S4 (HMO-POS D-SNP) | 1,112 |
| HumanaChoice H5216-437 (PPO) | Humana USAA Honor Giveback (PPO) | 54 |
| Humana Value Plus H5216-195 (PPO) | HumanaChoice H5216-223 (PPO) | 28 |
| HumanaChoice SNP-DE H5216-468 (PPO D-SNP) | HumanaChoice SNP-DE H5216-267 (PPO D-SNP) | 10 or fewer |
Who holds the members
- UnitedHealth36,567
- Kaiser Foundation Health Plan24,515
- Humana7,980
- CVS Health3,222
- Devoted Health2,096
- Intermountain Health Care430
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- UHC Nursing Home Plan CO-F001 (PPO I-SNP)UnitedHealth5.0
- Humana Dual Select H0028-078 (HMO D-SNP)Humana4.5
- Humana Essentials Plus Giveback (HMO)Humana4.5
- Humana Essentials Plus Giveback (PPO)Humana4.5
- Humana Total Complete (HMO)Humana4.5
- Humana Value Choice (PPO)Humana4.5
- HumanaChoice SNP-DE H7617-067 (PPO D-SNP)Humana4.5
- UHC Dual Advantage CO-V1 (PPO D-SNP)UnitedHealth4.5
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 65 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open Jefferson 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 Colorado 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.