Illinois Medigap Birthday Rule: Switch Medicare Supplement Plans Without Underwriting
Illinois Medicare Supplement policyholders have an annual guaranteed right to switch Medigap plans without medical Underwriting. The Illinois Medigap Birthday Rule gives you 45 days after your birthday each year to shop for a lower rate, no health questions, no risk of denial.
What Is the Illinois Medigap Birthday Rule?
Illinois’s window: 45 days starting on your birthday. During this window, insurance carriers cannot use your health status to deny coverage or charge you more.
Who Qualifies?
- Must reside in Illinois
- Must currently have a Medigap plan
- Must apply within 45 days of your birthday
Which Plans Can You Switch To?
Illinois follows the equal-or-lesser standard: you can switch to a plan with equal or fewer benefits than your current plan.
| From | To | Allowed? |
|---|---|---|
| Plan G | Plan G (new carrier) | Yes, same benefits, possible savings |
| Plan G | Plan N | Yes, fewer benefits, lower Premium |
| Plan N | Plan N (new carrier) | Yes, same benefits, possible savings |
| Plan N | Plan G | No, Plan G has more benefits |
| Plan F | Any lower or equal plan | Yes |
The most popular use: switching to the same plan letter at a cheaper carrier. Because plan benefits are standardized, you lose nothing in coverage while potentially saving hundreds of dollars per year.
How to Use Illinois’s Birthday Rule
Step 1: Starting on your birthday, you have 45 days. Set a reminder before your birthday to give yourself time to shop.
Step 2: Compare your current plan letter across Illinois carriers. Work with a licensed broker to get multiple quotes at once.
Step 3: Apply during your window. No health questions will be asked.
Step 4: Get written confirmation of your new coverage effective date, then cancel your old plan.
Frequently Asked Questions
Does this cover Medicare Advantage? No. Medicare Supplement plans only.
Can carriers deny my application during the window? No. The rule requires Guaranteed issue for the full 45 days.
Can I upgrade to a richer plan? No. Equal or lesser benefits only.
What if I miss the 45-day window? Wait for next year, or check for qualifying life event rights.
The Bottom Line
Illinois’s 45-day birthday window is your annual opportunity to lower your Medigap premiums without risking your coverage. If your rate has been climbing, take 30 minutes during your next birthday window to compare rates, it could save you hundreds of dollars per year.
Compare Medigap rates in Illinois at no cost. Get a free quote from REMEDIGAP today.
Official resource: Illinois Department of Insurance
See also: What Is the Medigap Birthday Rule?, overview of all states with birthday rule protections, how windows work, and how to use them.
Written by Michael Quinn
Licensed Broker, REMEDIGAP Founder
Fact Checked by Joann Quinn
Chief Compliance Officer
As a licensed insurance broker, REMEDIGAP upholds the principles of integrity in our editorial standards and ensures transparency in how we receive compensation from our insurance partners.