Medicare: How to Enroll

At Medical Mutual, we make enrolling in a Medical Mutual Medicare plan easy. Just choose your preferred method below. Remember, if you want to enroll in a Medicare Advantage or a Medicare Supplement insurance plan, you must first be enrolled in Medicare Part A and Part B (Original Medicare).

Online

Use our simple online application to apply for Medicare, which also let you compare plan options side-by-side so you can find the right plan for you. You can also print a copy of your completed application for your records.

Enroll in a Plan 

Medicare beneficiaries may also enroll in a MedMutual Advantage® plan through the Centers for Medicare & Medicaid Services (CMS) Medicare Online Enrollment Center at http://www.medicare.gov.

Phone

Call our team of licensed agents who can help you enroll over the phone.

Call: 1-800-543-3241
(TTY 711)

Mail

Access your enrollment application below. Please be sure to select a plan that is available in your county. See a breakdown of our plans and counties in Section 1.

Enrollment Application

When you've completed your application, return it by mail to:

Medical Mutual
P.O. Box 94563
Cleveland, OH 44101

Or you may fax your application to:
1-800-542-2583

Once we receive your enrollment information, you will get a confirmation letter in the mail.

Please note: We do not offer a mailing option for our Medicare Supplement Insurance plans. Please enroll in a Medicare Supplement insurance plan online or by phone.

After You Enroll

Once Medical Mutual starts processing your enrollment form, here is what you can expect based on the plan you selected.

Medicare Advantage Plans with Prescription Drug (MAPD)

We will review your information and confirm with the Centers for Medicare & Medicaid Services (CMS) that you qualify for Medicare.

If everything is in order, we will send you a letter within 10 days to confirm you are a member. Call us at 1-800-982-3117 (TTY 711) if you do not receive your letter before your coverage is scheduled to begin.

Shortly after this, we will send you the following:

  • Member ID card
  • Welcome Kit
  • Mail-order prescription form
  • Instructions for requesting directories or a formulary

Medicare Supplement Insurance Plans

After we process and issue your policy, we will send your member ID card and enrollment materials to you. You should receive these within 10 business days of your application’s approval. Your member ID card is similar to other insurance cards you may have had – you will need to bring it with you to use any of the plan’s benefits.

Page last updated on 10/1/2025
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