No Medicare Advantage plan was filed in Custer, Montana for 2027
Every Medicare Advantage plan available in Custer in 2026 has left for 2027, and no carrier filed a replacement. CMS counted 344 people enrolled in one here as of 2026-09-01. All of them need to make a choice for January 1.
What this means
A Medicare Advantage plan is filed county by county. No filing means there is no Medicare Advantage plan to join in Custer for 2027 — not that a plan is hiding, and not that anyone loses Medicare. People who make no change stay in Original Medicare (Part A and Part B), which works everywhere, and can add a stand-alone Part D drug plan separately.
Carriers sometimes file late or amend a service area, and CMS republishes the plan list through the autumn. This page is rebuilt from each release, so it will show plans if any are added.
Where to check
- Medicare.gov Plan Compare or 1-800-MEDICARE (TTY 1-877-486-2048) — the official source, including stand-alone Part D plans for this county
- Your State Health Insurance Assistance Program (SHIP) — free, unbiased, one-to-one help
- What was available here in 2026 — the plans that are leaving
- How many people nationally have to choose a new plan