Medicare Learning Center
What Determines Your Medicare Supplement Cost?
Published rate ranges age quickly. A useful review compares current quotes for the same standardized plan letter and checks how enrollment timing affects eligibility.
Medigap premiums vary by insurer and applicant. The same Plan G has the same standardized medical benefits from one insurer to another, but the premium, rating method, discounts, service, and rate history can differ.
Use current, applicant-specific quotes instead of a broad statewide or national estimate. Do not replace existing coverage until a new policy is approved and its effective date is confirmed.
Six factors that can affect the premium
Legal residence and ZIP code
Age and the insurer's rating method
Tobacco status where permitted
Plan letter and high-deductible option
Available household discounts
Enrollment rights and medical underwriting
Compare like with like
Standardized Medigap plan letters make benefit comparisons more direct. Compare one Plan G against another Plan G, or one Plan N against another Plan N. Plan N has different cost-sharing than Plan G, so a lower premium is not the complete comparison.
Ask for the current premium, rating method, household discount rules, application requirements, and effective date. A low introductory premium does not guarantee future increases will be lower.
Learn how community-rated, issue-age, and attained-age pricing work.
Enrollment timing can affect your choices
Your federal six-month Medigap Open Enrollment Period begins the first month you are 65 or older and enrolled in Part B. After it ends, an insurer may use medical underwriting unless a federal or state guaranteed-issue right applies.
Review My Supplement Rate
Bring your current plan letter and premium. We can compare relevant current options available through represented carriers and explain whether underwriting may apply.
Frequently Asked Questions
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