High-Deductible Plan G: Costs and Tradeoffs

How it works

Original Medicare Still Pays First

High-deductible Plan G is a Medicare Supplement option used with Original Medicare. Medicare processes covered services under its rules. You pay applicable Medicare cost sharing until the high-deductible policy’s threshold is met; the supplement then pays its covered benefits according to the policy.

This is different from waiting for Medicare itself to begin paying. It is also different from a Medicare Advantage high-deductible plan or Medical Savings Account. The name describes the supplement’s deductible.

The annual threshold

What Is the High-Deductible Plan G Deductible?

For 2026, the high-deductible Medigap threshold is $2,950. Medicare updates this amount annually. Do not use that figure as a confirmed 2027 amount. Check the policy for the calendar year being quoted and how it records eligible spending.

Plan G does not cover the Part B deductible. Ask the insurer to explain how your Part B deductible and other Medicare-covered cost sharing count toward the high-deductible threshold. Premiums, prescription drug-plan costs and services outside the policy’s benefits do not become covered just because the threshold has been met.

Compare the designs

Standard Plan G versus High-Deductible Plan G

Work through the numbers

Compare Annual Premium Savings with a Busy Healthcare Year

Use real quotes for your age, location and eligibility. For an illustration only, suppose standard Plan G costs $180 a month and high-deductible Plan G costs $70. The annual premium difference is $1,320. That is a saving on premiums, not a guarantee of saving $1,320 after medical bills.

Build two budgets: a year with little covered care and a year with substantial covered cost sharing. In the second budget, include the high deductible, premiums and expenses outside the supplement. Also account for the standard policy’s Part B deductible. Avoid treating the high deductible as a universal cap on every medical expense.

Cash flow matters

Could You Pay the Deductible Early in the Year?

A lower monthly premium may fit someone who can comfortably reserve money for cost sharing and accepts uncertainty. It may be a poor fit if several bills arriving together would mean delaying payment or care. Annual arithmetic alone does not describe that pressure.

• Set aside the difference in premiums rather than assuming it will never be needed.
• Ask how claims reach the insurer and how you can track deductible credit.
• Review predictable specialist visits or procedures in your budget.
• Keep prescription coverage and other uncovered expenses in a separate budget line.

Changing later

Do Not Assume You Can Upgrade Whenever You Want

Switching from high-deductible coverage to standard Plan G later can depend on underwriting or a specific protected right. A change in health may affect the options then available. Check state law and the insurer’s rules before choosing this design as a short-term bargain.

Read the main Plan G guide for the underlying benefits. If a rate increase triggered this search, use the premium-increase checklist to compare all available routes.