happy man

Medicare Supplement Insurance Plans

A Medicare Supplement Insurance Plan works with Original Medicare to “fill the gaps” in your coverage, and protect you from many of the out-of-pocket costs Original Medicare does not pay.

IMPORTANT: If you are eligible for a Retiree Group Medicare plan, some of this information may not apply to you. Please ask your employer or benefit administrator about your Medicare options, eligibility and enrollment information.
medicare supplement icon

Medicare Supplement Insurance Plans

Added Coverage with Lots of Flexibility

Medicare Supplement Insurance Plans are designed to help fill the gaps in Original Medicare. If you choose this type of plan, it will help pay your portion of the covered expenses that Original Medicare does not. And it will give you the added freedom to use any doctor, specialist, or hospital that accepts Medicare.

Medicare Supplement Insurance Plans do not cover prescription drugs. However, any Medicare Supplement Insurance Plan can be paired with a standalone Part D prescription drug plan. It’s important to note that you cannot have a Medicare Supplement Insurance Plan and a Medicare Advantage plan at the same time.

Enrolling in a Medicare Supplement Insurance Plan

You can enroll in an individual Medicare Supplement Insurance Plan at any time of the year. But your acceptance is guaranteed only during the six-month Open Enrollment Period that begins the first day of the month you are enrolled in Medicare Part A and Part B. So it’s a good idea to consider this type of coverage before you enroll in Medicare for the very first time.

If a Medicare Supplement Insurance Plan is offered by your employer, you can enroll in it at retirement, after you have enrolled in Medicare Part A and Part B.

Different Plans for Different Budgets and Health Care Needs

Medicare Supplement Insurance Plans are identified by the letters A, B, C, D, F, G, K, L, M, and N. Each plan covers a different set of costs. Some plans only cover basic benefits. Others may cover a wide range of health care costs.

Blue Cross and Blue Shield of Illinois offers affordable Medicare Supplement Insurance Plan and Part D prescription drug plan options to meet a variety of needs and budgets.

Discover which plan best suits your budget and your lifestyle (this plan is all about you, after all).

Compare Blue Medicare SupplementSM Insurance Plans

Get Your Medicare Timeline

Answer a few simple questions and we’ll provide you with a personalized timeline. You’ll also receive reminders with important information and actions you can take to stay on track as you near your Medicare eligibility.

Create My Timeline →

Compare, Choose and Enroll

Get started with your member login. Verify your information and see personalized recommendations based on lowest cost and most comprehensive coverage. Compare your options, contact an agent and enroll, all in one easy-to-use tool.

Help Me

Questions? Let us help.

As our valued member, you have access to exclusive resources and assistance. We’re here to help you make a smooth transition to Medicare. Call us to learn more.

1-800-000-0000 (TTY 711)

We’re open between 8:00 a.m. – 8:00 p.m., local time, 7 days a week. If you’re calling from April 1 through September 30, alternate technologies (for example, voicemail) will be used on the weekends and holidays.

For Blue Medicare Supplement Insurance Plans Customer Service:

1-800-624-1723 (TTY 711)

We’re open 7:00 a.m. – 6:00 p.m., CT, Monday through Friday.


This Information is a solicitation for insurance.

*Not connected with or endorsed by the U.S. Government or Federal Medicare Program.

Marketing Direct LLC, d.b.a. Wunderman Thompson, is an independent company that has contracted with Blue Cross and Blue Shield of Illinois to provide information technology support for members with coverage through BCBSIL. BCBSIL makes no endorsements, representations or warranties regarding third-party vendors and the products and services offered by them.

Blue Cross and Blue Shield of Illinois, a Division of Health Care Service Corporation, a Mutual Legal Reserve Company, an Independent Licensee of the Blue Cross and Blue Shield Association

300 East Randolph Street, Chicago, Illinois 60601

© Copyright 2024 Health Care Service Corporation. All Rights Reserved.

File is in portable document format (PDF). To view this file, you may need to install a PDF reader program. Most PDF readers are a free download. One option is Adobe® Reader® which has a built-in reader. You can download other tools and learn more about accessibility at adobe.com.

You are leaving this website/app (“site”). The new site may be offered by a vendor or an independent third party. The site may also contain non-Medicare related information. Some sites may require you to agree to their terms of use and privacy policy.