Medicare plans
Medicare plans in Montana
23 Medicare Advantage plans are offered somewhere in Montana for 2027 (32 in 2026), 11 at a $0 premium. 47 of 56 counties have at least one, and 9 drug-only plans cover the state.
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Shopping for your own coverage? Use Medicare Plan Finder at medicare.gov or call 1-800-MEDICARE.
Montana at a glance
| Plans offered in the state | 2026 | 2027 |
|---|---|---|
| Advantage | 32 | 23 |
| Advantage at a $0 premium | 15 | 11 |
| Drug only | 11 | 9 |
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Source: CMS CY2026 Medicare Advantage and Part D landscape file, as of September 25, 2025. Publisher page
Counties in Montana
- Beaverhead County7 Advantage plans, 5 at $0
- Big Horn County9 Advantage plans, 5 at $0
- Blaine CountyNo Advantage plans
- Broadwater County11 Advantage plans, 6 at $0
- Carbon County9 Advantage plans, 5 at $0
- Carter CountyNo Advantage plans
- Cascade County17 Advantage plans, 9 at $0
- Chouteau County10 Advantage plans, 6 at $0
- Custer CountyNo Advantage plans
- Daniels County2 Advantage plans, 1 at $0
- Dawson CountyNo Advantage plans
- Deer Lodge County10 Advantage plans, 6 at $0
- Fallon County2 Advantage plans, 1 at $0
- Fergus County9 Advantage plans, 6 at $0
- Flathead County17 Advantage plans, 9 at $0
- Gallatin County13 Advantage plans, 9 at $0
- Garfield County2 Advantage plans, 1 at $0
- Glacier County9 Advantage plans, 5 at $0
- Golden Valley County9 Advantage plans, 5 at $0
- Granite County9 Advantage plans, 6 at $0
- Hill CountyNo Advantage plans
- Jefferson County12 Advantage plans, 6 at $0
- Judith Basin County10 Advantage plans, 6 at $0
- Lake County7 Advantage plans, 5 at $0
- Lewis and Clark County16 Advantage plans, 10 at $0
- Liberty County9 Advantage plans, 6 at $0
- Lincoln County11 Advantage plans, 6 at $0
- Madison County9 Advantage plans, 6 at $0
- McCone CountyNo Advantage plans
- Meagher County9 Advantage plans, 6 at $0
- Mineral County9 Advantage plans, 6 at $0
- Missoula County14 Advantage plans, 10 at $0
- Musselshell County8 Advantage plans, 5 at $0
- Park County8 Advantage plans, 4 at $0
- Petroleum County2 Advantage plans, 1 at $0
- Phillips County2 Advantage plans, 1 at $0
- Pondera County11 Advantage plans, 6 at $0
- Powder River County2 Advantage plans, 1 at $0
- Powell County10 Advantage plans, 6 at $0
- Prairie County2 Advantage plans, 1 at $0
- Ravalli County10 Advantage plans, 5 at $0
- Richland CountyNo Advantage plans
- Roosevelt County2 Advantage plans, 1 at $0
- Rosebud County9 Advantage plans, 5 at $0
- Sanders County12 Advantage plans, 6 at $0
- Sheridan CountyNo Advantage plans
- Silver Bow County11 Advantage plans, 6 at $0
- Stillwater County10 Advantage plans, 5 at $0
- Sweet Grass County7 Advantage plans, 5 at $0
- Teton County14 Advantage plans, 6 at $0
- Toole County8 Advantage plans, 5 at $0
- Treasure County8 Advantage plans, 5 at $0
- Valley County2 Advantage plans, 1 at $0
- Wheatland County7 Advantage plans, 5 at $0
- Wibaux CountyNo Advantage plans
- Yellowstone County16 Advantage plans, 9 at $0
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
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About this data
Plans, premiums, out-of-pocket maximums, and drug deductibles come from the CMS CY2027 Medicare Advantage and Part D landscape file. Change from 2026 compares it with the CY2026 landscape. Stars are the 2027 Star Ratings CMS released October 8, 2026: the overall rating for Advantage plans and the Part D summary rating for drug-only plans, which have no overall rating.
Advantage counts include Special Needs Plans, which are open only to people who qualify. Drug-only plans are listed by CMS for a whole state, so every county page shows them. Employer group plans are not in the file. This page lists plans; it does not say which plan fits anyone, and Rivvi does not sell plans.
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Source: CMS CY2026 Medicare Advantage and Part D landscape file, as of September 25, 2025. Publisher page
Source: CMS 2027 Medicare Part C and D Star Ratings, as of October 8, 2026. Publisher page