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Medicare plans in Custer County, MT — 2027
What agents look up before working a county: plan count, carriers, $0-premium share, star distribution, MOOP range, the 65+ and 60–64 population, and what changed since last year.
In 2027, Custer County, Montana has 9 Medicare plans (0 Medicare Advantage with drug coverage, 0 without, 9 standalone Part D, 0 Special Needs) from 5 carriers. 0 Medicare Advantage plans have a $0 premium.
What changed vs 2026
- 8 fewer plans than 2026
- Carriers exited: Aetna Medicare, Blue Cross and Blue Shield of Montana
- $0-premium plans down 4
- Average star rating up 0.4
Market snapshot
- Residents 65 and older
- 2,482
- Residents 60–64, aging in over the next five years
- 964
- Medicare eligibles
- 2,879
- Medicare Advantage penetration
- 14.2%
- Plans per 1,000 residents 65+
- 3.6
Carriers by number of plans
- Humana — 3 plans
- UnitedHealthcare — 2 plans
- Wellcare — 2 plans
- HealthSpring — 1 plan
- MedicareBlue Rx — 1 plan
Plans sorted by CMS star rating, then premium
| Plan | Carrier | Category | Plan type | Monthly premium | Drug deductible | Out-of-pocket maximum | Star rating |
|---|---|---|---|---|---|---|---|
| Humana Basic Rx Plan (PDP) (S5884-145-0) | Humana | PDP | PDP | $18.30 | $700 | 4.5 | |
| Humana Value Rx Plan (PDP) (S5884-204-0) | Humana | PDP | PDP | $33.30 | $687 | 4.5 | |
| Humana Premier Rx Plan (PDP) (S5884-171-0) | Humana | PDP | PDP | $123 | $350 | 4.5 | |
| Wellcare Value Script (PDP) (S4802-158-0) | Wellcare | PDP | PDP | $5.30 | $700 | 3.0 | |
| AARP Medicare Rx Saver from UHC (PDP) (S5921-370-0) | UnitedHealthcare | PDP | PDP | $10.30 | $700 | 3.0 | |
| Wellcare Classic (PDP) (S4802-089-0) | Wellcare | PDP | PDP | $16.30 | $700 | 3.0 | |
| MedicareBlue Rx Standard (PDP) (S5743-001-0) | MedicareBlue Rx | PDP | PDP | $179.10 | $700 | 3.0 | |
| AARP Medicare Rx Preferred from UHC (PDP) (S5921-406-0) | UnitedHealthcare | PDP | PDP | $222.90 | $300 | 3.0 | |
| HealthSpring Assurance Rx (PDP) (S5715-043-0) | HealthSpring | PDP | PDP | $117.10 | $700 | 2.5 |
Showing 9 of 9 plans.
Nearby counties
Agent Tools
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About this data
Source: CMS Medicare Advantage/Part D Landscape files, plan year 2027; population: U.S. Census Bureau ACS 5-year 2024; MA penetration: CMS October 2026.
This page summarizes publicly available CMS data. It is not a plan finder and does not recommend plans. To compare and enroll in plans, use Medicare.gov or talk to a licensed agent. Medicare.gov plan finder.