Medicare Supplement (Medigap)
Absolute doctor freedom and 100% predictable medical costs with zero networks.
$100 to $280+ per month (Pricing varies based on age, location, and plan selection)
Nationwide access: see any doctor or specialist in the US who accepts Medicare
No prescription coverage. Must purchase a separate standalone Part D drug plan.
Extreme protection: covers 100% or nearly 100% of all Original Medicare gaps
Plan Overview & Core Purpose
Medicare Supplement insurance policies, commonly called Medigap, are sold by private companies to fill the "gaps" in Original Medicare coverage. Original Medicare pays for many, but not all, of your healthcare services. Medigap plans help pay your share of these costs, including deductibles, the 20% coinsurance for doctor visits, and hospital copays. Medigap plans are standardized by the federal government, meaning a "Plan G" offers the exact same medical benefits regardless of which insurance company sells it.
How This Benefits You
Total Specialist Freedom
No gatekeeper referrals. If you need to see a cardiologist, dermatologist, or oncologist, you simply book the appointment and go.
Incredible Cost Predictability
No copays. With Plan G, you pay your monthly premium and one small annual deductible. Beyond that, all Medicare-approved doctor visits are 100% covered.
Guaranteed Renewability
As long as you pay your premiums on time, the insurance company cannot cancel your policy, regardless of how many medical claims you file or how your health changes.
Detailed Educational Guide
The Power of Zero Networks
Unlike network-restricted plans, Medigap plans have zero network boundaries. If a doctor, clinic, or hospital accepts Medicare—which is roughly 97% of primary care doctors and specialists in the United States—they must accept your Medigap policy. You never need a referral to see any specialist.
Understanding Plan G
Plan G has become the industry standard for new enrollees. It covers all Medicare gaps (including the Part A hospital deductible and the 20% outpatient coinsurance) except for the small annual Part B medical deductible ($257 in 2026). Once you meet that deductible, you pay exactly $0 for covered medical visits for the rest of the year.
Standardized Benefit Letters
Medigap plans are categorized by letters (A, B, C, D, F, G, K, L, M, N). Because they are standardized by law, Plan G with Company A has the identical coverage as Plan G with Company B. The only difference is the monthly premium rate and the company's reputation for rate stability.
Major Pros & Advantages
- •Complete peace of mind with virtually $0 out-of-pocket bills for all covered care.
- •Travel anywhere in the United States and see any Medicare provider without network worries.
- •Foreign travel emergency coverage is included on most popular plans.
Key Cons & Trade-offs
- •Higher fixed monthly premiums that increase as you age.
- •Does not cover retail prescription drugs, requiring you to purchase and manage a standalone Part D plan.
- •Subject to medical history screening (underwriting) if you try to switch plans later in life.
When and How to Enroll
Understanding your timing is crucial to avoid lifetime late-enrollment penalty fees and to guarantee approval.
Medigap Open Enrollment Period
This is a 6-month window that starts the month you turn 65 and are enrolled in Medicare Part B. During this time, you have a "guaranteed issue right" and can buy any Medigap plan without answering a single health question. You cannot be denied coverage or charged more for pre-existing conditions.
Enrolling After 65
If you miss this initial 6-month window, you must undergo medical underwriting in most states. The insurer will review your health history and can refuse to sell you a policy or charge you significantly higher rates based on your health.
Frequently Asked Questions
Margaret's Medical Freedom
Margaret was diagnosed with a chronic rheumatoid condition that requires visiting multiple specialists, regular blood labs, and complex therapeutic treatments. She also travels to Ohio for three months every summer to visit family.
Max helped Margaret review her options, and she enrolled in a Medigap Plan G. This allows her to visit her specialists in both Florida and Ohio seamlessly.
Margaret pays a fixed monthly premium of $165. When she visits her doctors, receives lab work, or undergoes treatments, she pays absolutely nothing at the desk because she met her annual Part B deductible. Her medical costs are completely predictable.
William's Birmingham Medigap Enrollment
William wanted predictable medical costs without network restrictions and planned to keep seeing specialists at UAB Medicine after retiring from employer coverage.
During his Medigap open enrollment window, William enrolled in Plan G with a carrier offering competitive attained-age pricing in Jefferson County, paired with a standalone Part D plan for his prescriptions.
William avoided surprise copays on specialist visits, kept access to his preferred Alabama providers under Original Medicare, and budgeted a stable monthly premium instead of variable medical bills.
Max Zlobin
Independent Medicare Advisor
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