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1 min readPublished June 24, 2026
The Medigap Open Enrollment Window: Why Timing Matters

The Medigap Open Enrollment Window: Why Timing Matters

A calm overview of the six-month Medigap window when guaranteed-issue rules work differently.

The six-month window

When you first enroll in Medicare Part B, you generally have a six-month Medigap open enrollment period. During that time, insurers in most states must sell you a Medigap policy without health questions.

Missing that window is one of the most common regrets described in beneficiary forums when someone later wants to leave Medicare Advantage.

After the window

Outside guaranteed-issue protections, insurers may use medical underwriting. Pre-existing conditions can affect price or eligibility.

  • Some states offer additional Medigap protections — rules vary.
  • Verify your state's rules with SHIP or Medicare.gov.

Educational content only — verify rules for your state and situation.

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Part B Optimizer Benchmark Tool Editorial Team

Plain-language Medicare education reviewed for accuracy and CMS-compliant tone. We do not sell insurance, recommend specific carriers, or enroll you in coverage.

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The Part B Optimizer Benchmark Tool is an independent educational platform and Third-Party Marketing Organization (TPMO). We are not affiliated with or endorsed by Medicare, CMS, or any federal government agency. We may not represent every plan available in your area. Information is provided for educational purposes only. The Part B Optimizer Benchmark Tool may refer to licensed insurance agencies that include CMS Health & Wealth Insurance and other participating agencies. Articles in the Learning Center are educational only and do not recommend or endorse any specific carrier or plan.

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