Is my Medicare plan ending in Lewistown, MT?
Medicare plans are set by county. Lewistown is in Fergus County, so the plans listed as leaving Fergus County for 2027 apply to Lewistown residents.
Quick answer for Lewistown
9 Medicare plans are from 3 companies listed in Fergus County for 2026 but not for 2027, covering at least 305 people enrolled today. If you live in Lewistown and have one of these plans, you can choose a new plan from October 15 to December 7, and coverage starts January 1.
Companies with plans leaving Fergus County
| Company | Plans leaving | People enrolled (at least) |
|---|---|---|
| Blue Cross (Health Care Service Corp) | 6 | 305 |
| Cigna HealthSpring (HCSC) | 2 | not listed |
| Aetna (CVS Health) | 1 | not listed |
Plans going away in Fergus County
| Plan going away | Company | People enrolled (at least) |
|---|---|---|
| Blue Cross Medicare Advantage Choice Plus (PPO) H0107-005 | Blue Cross (Health Care Service Corp) | 201 |
| Blue Cross Medicare Advantage Classic (PPO) H0107-003 | Blue Cross (Health Care Service Corp) | 40 |
| Blue Cross Medicare Advantage Dental Premier (PPO) H0107-007 | Blue Cross (Health Care Service Corp) | 35 |
| Blue Cross Medicare Advantage Health Choice (PPO) H0107-010 | Blue Cross (Health Care Service Corp) | 29 |
| Blue Cross Medicare Advantage Optimum (PPO) H0107-004 | Blue Cross (Health Care Service Corp) | 10 or fewer |
| Blue Cross Medicare Advantage Protect (PPO) H0107-011 | Blue Cross (Health Care Service Corp) | 10 or fewer |
What to do if you live in Lewistown
- Read the notice from your plan. It names the plan that is ending and your choices.
- Compare 2027 options before December 7: another Medicare Advantage plan, or Original Medicare with a Medicare Supplement and a Part D drug plan.
- Check that your doctors, hospitals and pharmacy near Lewistown are covered by any plan you consider.
- Free, unbiased help: Montana SHIP (State Health Insurance Assistance Program) at 1-800-551-3191, or Medicare.gov, 1-800-MEDICARE.
Is my Medicare plan ending in Lewistown?
Medicare plans are offered by service area, usually county by county. Check the list above for your plan name or plan ID. A plan can be listed because it was renumbered or replaced, so your plan notice is the final word.
What happens if I do nothing in Lewistown?
If your plan is not renewing and you do not choose a new one, you may be moved to Original Medicare, which does not include drug coverage. Compare options before December 7 and confirm your dates with Medicare.gov or your plan notice.
Do I have to enroll if I call?
No. Calling is a conversation about your options, and you are never required to enroll.
Lewistown residents: call 855-367-1095
Call Lander LLC to go over your options. There is no cost to call or to speak with an agent, and you are never required to enroll in anything.
Call 855-367-1095 Open 8 AM-10 PM Eastern timeMore for Lewistown: Lewistown health insurance · Fergus County · All Montana plans ending for 2027 · Lewistown population 6,149 (Census Bureau).
Source: CMS Medicare Advantage and Part D landscape files for 2026 and 2027, and CMS enrollment data from September 2026.
Reviewed by Richard Lander, licensed insurance agent (NPN 21255551), Lander LLC. Last updated October 3, 2026. This page is educational and is not a quote, an offer of coverage, or legal or tax advice.