Health Care Service Corporation in Montana: 12,685 Medicare Advantage members, 17.3% share, 2nd of 4.
Health Care Service Corporation lost 4,268 members (−25.2%) from Nov 2025 to Oct 2026 and stepped −26.0% at the 2026 election period against the market's −2.0%. It sells in 34 of Montana’s 49 counties with visible members and leads 0; Humana sits just ahead at 74.2%, UnitedHealth just behind at 7.0%.
Health Care Service Corporation's twelve months in Montana
Visible members each month, Nov 2025 to Oct 2026. The December-to-January step is the election period. The market line for the state is on the Montana page.
Where Health Care Service Corporation's Montana members are
The carrier’s five largest counties by visible members, with its share of each county’s visible Medicare Advantage members. It sells in 34 counties and leads 0 of them.
| County | Health Care Service Corporation members | Share of county | County visible members | County leader |
|---|---|---|---|---|
| Gallatin | 1,990 | 42.0% | 4,734 | Humana |
| Missoula | 1,538 | 24.7% | 6,226 | Humana |
| Flathead | 1,405 | 15.1% | 9,296 | Humana |
| Yellowstone | 1,325 | 9.8% | 13,499 | Humana |
| Cascade | 1,153 | 16.2% | 7,131 | Humana |
Health Care Service Corporation against the Montana market
The carrier’s figures beside the state’s, each weighted by members. A difference is a difference, not a grade: a higher maximum or a lower rating is a design and a result, read in context.
top three hold 98.5%
market 4.01, −0.01, 2nd of 3 rated
market 97%
market $6,550
| # | Carrier | Members | Share | Twelve months | Election step | Counties led | Rating | $0 premium |
|---|---|---|---|---|---|---|---|---|
| 1 | Humana | 54,295 | 74.2% | +28.0% | +21.1% | 35 of 38 | 4.10 | 98% |
| 2 | Health Care Service Corporation | 12,685 | 17.3% | −25.2% | −26.0% | 0 of 34 | 4.00 | – |
| 3 | UnitedHealth | 5,102 | 7.0% | −56.8% | −51.0% | 0 of 18 | 3.29 | 83% |
What 2027 does to Health Care Service Corporation's plans in Montana
The fate assigned to each of the carrier’s plans for 2027, joined to the members in it today.
12,685 members are in 5 plans that end and must choose again. In all, 100% of Health Care Service Corporation’s Montana members are in a plan whose service area or status changes.
The read on Health Care Service Corporation in Montana is in Carrier Command.
Risk and rebate against the market, the five-test read on coding versus selection, Stars levers and next year's cut points, the election-period forecast and the county-by-county standing, written as a monthly page.
Health Care Service Corporation elsewhere, and the rest of Montana
- Humana74.2%
- UnitedHealth7.0%
How these numbers are made
- Members are visible members: CMS suppresses any plan-county cell of ten or fewer, so small counties undercount. Market share excludes employer group plans.
- Enrollment is Oct 2026; the twelve months run Nov 2025 to Oct 2026; the election step compares December 2025 with January 2026.
- Health Care Service Corporation is the parent organization Health Care Service Corporation; its 5 plans in Montana may sell under other brand names. The rating is the 2027 overall Star Rating of its contracts weighted by members in Montana; $0 premium and the in-network maximum are the 2027 filings weighted by members today.
- Plan fates are the ones assigned for contract year 2027.
- Every figure comes from public CMS data as Livmor reads it, and the page is rebuilt when a new month posts. Livmor Carrier Command, public CMS data.