The Quiet $32,000 Cost of Skipping the Medigap Open Enrollment Window at 65

Medigap standard rates are guaranteed only during the six-month period that begins when enrolling in Medicare Part B. Missing that window can lead to medical underwriting, where later health events such as a diabetes diagnosis or a stent at age 70 can prevent access to the best coverage. A Plan G premium is cited as $150 to $220 per month at standard issue, versus $230 to $330 per month after later health events, if approved. The window lasts six months and occurs once. Retirees face tighter finances, with per capita disposable income at $68,617 in Q1 2026 and a personal savings rate of 4% versus 6.2% two years earlier. National healthcare spending reached $3,741.3 billion in March 2026, up from $3,463.6 billion a year earlier. The tradeoff is short-term savings with Medicare Advantage versus long-term cost control with Medigap if enrolled during the open window.

"The six-month window that opens when you enroll in Medicare Part B is the only time in your life an insurer must sell you a Medigap policy at standard rates, regardless of your health history."

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