Medicare Supplement Insurance Policy

Coverage doesn't have to end where Medicare leaves off. That's why we offer affordable policies to meet your needs.

For more information about Medicare Supplement Insurance Policies, call 1-855-447-2900, email us at or call to your local insurance agent.

What is Medicare?

Medicare is the federal health insurance program for people who are 65 or older, certain
younger people with disabilities, people with end-stage renal disease (permanent kidney
failure requiring dialysis or a transplant, sometimes called ESRD).

Why Consider Medicare Supplement Insurance Policy

Medicare is your primary insurance coverage when you reach age 65, but it isn't designed to cover all your health care expenses. That's where a Medicare Supplemental Insurance Policy comes in.

A supplemental policy helps you manage and budget your health care expenses while giving you the freedom to choose your providers (who must accept Medicare) and a plan that best meets your needs. These policies help give you peace of mind.

When Can I Buy a Medicare Supplement Insurance policy?

The best time to buy a Supplement policy is during your 6-month Medigap Open Enrollment Period. You will generally get better prices and more choices among policies. During that time, you can buy any Medigap policy sold in your state, even if you have health problems.


This period automatically starts the month you're 65 and enrolled in Medicare Part B (Medical Insurance), and it can't be changed or repeated. After this enrollment period, you may not be able to buy a Medigap policy. If you are able to buy one, it may cost more due to past or present health problems.

For more information about Medicare Supplement Insurance Policies, call 1-855-447-2900, email us at or call to your local insurance agent.



We've got you covered. No matter what questions you have, our team is responsive to your needs and will work to get the answers you're looking for. We do everything we can to ensure you get the most from your coverage.

Learn More About Medicare

Agents Near You


Medicare Supplement polices MHCMSA20ID, MHCMSF20ID, MHCMSG20ID and MHCMSAN20ID underwritten by Montana Health CO-OP, dba Mountain Health Cooperative.


This is a solicitation of insurance and an insurance agent may contact you by telephone.


Not all plans are available in all states. Policy provisions and benefits may vary from state to state. These policies have exclusions, limitations, reduction of benefits, please see the Outline of Coverage for complete details.


Neither Montana Health CO-OP, dba Mountain Health Cooperative nor our Medicare Supplement policies are connected with or endorsed by the United States Government or the Federal Medicare program.

Contact information

Please see below the contact information for questions related to applications submitted, underwriting, commission inquiries, and active member inquiries. The contact information is also on our various documents associated with our products.



[Medicare Supplement Administrative Office]

[P.O. Box 2209, Duncan, OK 73034-2209]

[Telephone: 800-366-8354]


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Mountain Health CO-OP does not discriminate based on race, color, national origin, disability, age, sex, gender, sexual orientation, or health status in the administration of the plan, including enrollment and benefit determinations.


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