Skip to main content
https://www.illinoislegalaid.org/legal-information/understanding-medigap
Date: 10/23/2026

English ▼

English
Español

We open opportunities for justice.

User account menu

Quick Exit
Internet usage can be tracked. Use this to leave this site immediately. Remember to clear your browser history to hide activity.
  • Contact
  • Log in
  • Sign up
Home
  • Mobile - Search Block

    Google custom search block

  • Get Legal Help
  • About Us
  • Resources
    • I am...
      • a senior (60 years or older)
      • an immigrant to the U.S.
      • someone with a family member who was in jail or prison
      • a member of the LGBTQIA+ community
      • a veteran, active duty military or have had military service
      • a youth or parent of a youth
      • a survivor of abuse or crime
      • homeless or at risk of homelessness
      • living with a disability
      • living with HIV/AIDS
      • a non-profit organization or small business
    • Family & Safety
    • House & Apartment
    • Money & Debt
    • Business & Work
    • School & Education
    • Health & Benefits
    • Immigrants & Immigration
    • Voting & Civil Rights
    • Crime & Traffic
    • Estates & Powers of Attorney
    • Courts & Hearings
    • Form Library
    • Glossary
  • For Legal Professionals
    • Practice Resources
    • Lawyer Manuals
    • IICLE Library
    • LTF Initiatives
    • Calendar
    • Job Postings
    • Discussion Groups
    • Volunteer with Us
  • Mobile Login Menu

    User account menu

    User account menu

    Quick Exit
    Internet usage can be tracked. Use this to leave this site immediately. Remember to clear your browser history to hide activity.
    • Contact
    • Log in
    • Sign up
  • Language switcher block

    Language switcher

    • English

We open opportunities for justice.

Get Legal Help

How can we help you?

Search Icon

English ▼

English
Español
Debt Help Illinois logoStruggling with credit card bills? Behind on medical payments? Overwhelmed by debt? 

We’ve got solutions. Go to Debt Help Illinois, our website that combines legal, financial and practical information to help resolve your debt problems. Get details here.
 

Breadcrumb

  1. Home
  2. Health & Benefits
  3. Medicare
  4. Understanding Medigap

AddToAny buttons

PRINT
Print this to take with you
SHARE
Share this page to social media channels
QUICK EXIT
Internet usage can be tracked. Use this to leave this site immediately. Remember to clear your browser history to hide activity.
DONATE
Help ILAO open opportunities for justice

Health & Benefits

Worried about doing this on your own?  You may be able to get free legal help.

Apply Online
Understanding Medigap FAQ

AddToAny buttons

PRINT
Print this to take with you
SHARE
Share this page to social media channels
QUICK EXIT
Internet usage can be tracked. Use this to leave this site immediately. Remember to clear your browser history to hide activity.
DONATE
Help ILAO open opportunities for justice

What is Medigap? Copy link to this question The link has been copied. ×

Medicare supplement insurance fills the gaps between Medicare and someone’s out-of-pocket costs. It is often called Medigap insurance. These policies only pay for health care services that are medically necessary.

Medigap policies are sold by private insurance companies. The Illinois Department of Insurance (DOI) has a list of companies that sell Medigap. 

There are special rules regulating Medigap. Insurance companies must ensure that buyers carry only one policy. A person can buy Medigap if they have Medicare Parts A and B. If they have Medicare Advantage (also known as Medicare Part C, or Managed Medicare), they may not obtain Medigap.

When can someone enroll in Medigap? Copy link to this question The link has been copied. ×

Illinois residents between 65 and 75 years old have an opportunity to enroll in Medigap every year. The enrollment period in Illinois starts on a person’s birthday and lasts for 45 days.

If a person has Medicare and Medigap, they should not need any other medical insurance. You will need to pay a monthly premium for Medigap.

These policies do not include drug coverage for people in Medicare Part D. To get coverage for drugs, a person will need to enroll in a Medicare Part D prescription drug plan, if they do not have one yet.

How should someone decide what health insurance plan is right for them? Copy link to this question The link has been copied. ×

The Medicare website has a tool to help people compare policies. It helps them compare their needs with the coverage provided.

There are 10 standardized Medigap plans. Those plans are labeled A through N. Some plans are no longer sold. In Illinois, it is illegal to sell anything other than those 10 Medigap plans.

People should study the policies paragraph by paragraph and make sure they provide the coverage they want. All companies must offer the same benefits. The only difference between the companies is cost. It’s important to always ask for an explanation of the terms and coverage.

Where can someone get help with understanding Medigap? Copy link to this question The link has been copied. ×

The Senior Health Insurance Program (SHIP) is a free counseling service, and it has many free resources to help you make the best insurance choices. It helps senior citizens who have questions about health insurance, including:

  • Medicare,
  • Medicare Supplement Insurance,
  • Medicare Advantage Plans,
  • Prescription Drug Coverage, and
  • Long-Term Care Insurance.

Where can someone learn more about their insurance options? Copy link to this question The link has been copied. ×

The Illinois Department of Insurance has a website where people can ask questions or file complaints. The Illinois Department on Aging also has additional information about Medicare and Long Term Care Insurance Companies.

Medicare Interactive is a nonprofit that provides resources on understanding Medicare. 

Last full review by a subject matter expert
October 08, 2026
Last revised by staff
October 13, 2026

About our legal information

icon

Learn more

Find detailed explanations, frequently asked questions, videos, and related topics.

arrow
Getting Medicare benefits Intro
Explore the basics of Medicare, including who is eligible and the four parts of Medicare.
Medicare assignment explained Text article
Describes how some medical providers agree to not charge more for services than the medicare approved charge.

Worried about doing this on your own?  You may be able to get free legal help.

Apply Online

What’s next?

You have learned the basics. Choose what you would like to do next.

icon

Learn more

Find detailed explanations, frequently asked questions, videos, and related topics.

arrow
Getting Medicare benefits Intro
Explore the basics of Medicare, including who is eligible and the four parts of Medicare.
Medicare assignment explained Text article
Describes how some medical providers agree to not charge more for services than the medicare approved charge.
contact-us
Your feedback is the best way for us to improve our services. How can we improve this site?
Contact us
25 year logo

 

© 2026 Illinois Legal Aid Online. 
All rights reserved.

ILAO is a registered 501(c)(3) nonprofit organization. ILAO's tax identification number is 20-2917133.

  • English

Company

  • About
  • Team
  • Impact
  • Plans and Vision
  • Story
  • Events
  • Annual report
  • ILAO in the news
  • Why Donate?
  • Work with us

Resources

  • Family & Safety
  • House & Apartment
  • Money & Debt
  • Business & Work
  • School & Education
  • Health & Benefits
  • Immigrants & Immigration
  • Voting & Civil Rights
  • Crime & Traffic
  • Estates & Powers of Attorney
  • Court & Hearings

Quick Links

  • Form Library
  • Ready to Work Portal
  • Victims of Crime Portal
  • New Leaf Portal
  • Power of Planning Portal
  • Legal Self-Help Centers
  • Debt Help Illinois

 Charity Navigator

 

Terms and policies

  • Privacy Policy
  • Terms of Use
  • Site FAQs
25 year logo

 

© 2026 Illinois Legal Aid Online. 
All rights reserved.

ILAO is a registered 501(c)(3) nonprofit organization. ILAO's tax identification number is 20-2917133.