Medigap Plan G vs Plan N: Which Medicare Supplement Is Better?

If you’re choosing between Medigap Plan G and Plan N, Plan G delivers predictable, near-zero out-of-pocket costs after the Part B deductible but charges a higher monthly premium. Plan N lowers the monthly premium but adds a $20 copay for most doctor visits and a $50 copay for emergency room visits (waived if admitted). The right pick depends on how often you use medical care and how much uncertainty you can tolerate in your budget.

Both plans cover the same core benefits: Part A coinsurance, 365 extra hospital days after Medicare benefits end, the first three pints of blood, hospice coinsurance, skilled nursing facility coinsurance, and 80% of foreign travel emergency care (up to plan limits). The cost structure is where they diverge — and that difference can save or cost you hundreds each year.

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Side-by-Side Comparison for 2025

Feature	Plan G	Plan N
Monthly premium (national range)	$120–$220 (varies by insurer, state, age, gender)	$90–$170 (typically $30–$60 less)
Part B deductible (2025)	$257 – you pay it	$257 – you pay it
Part B excess charges	Covered at 100%	Not covered (you may pay up to 15% above Medicare-approved amount)
Doctor office visit copay	$0	$20 per visit (after Part B deductible met)
Emergency room copay	$0	$50 per visit (waived if admitted)
Skilled nursing facility coinsurance	Covered	Covered
Foreign travel emergency	80% covered up to plan limits	80% covered up to plan limits
Guaranteed-issue eligibility	During Medigap Open Enrollment	During Medigap Open Enrollment
Medical underwriting outside window	Required	Required
Best for	Frequent visits, chronic conditions, out-of-state travel	Low premium priority, healthy lifestyle, minimal visits

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What the Cost Difference Looks Like in Real Dollars

The practical gap: if you visit a doctor 12 times and the ER twice (not admitted) each year, Plan N adds $240 in office copays plus $100 in ER copays = $340 on top of your premium. A healthy enrollee who sees a doctor 4 times and never uses the ER pays only $80 in copays. Plan G eliminates all those copays, so your only out-of-pocket after the $257 Part B deductible is zero for covered services.

In 2025, the Part B premium is $185.00 per month (higher if IRMAA applies — income over $106,000 single or $212,000 married filing jointly triggers surcharges of $66.90 to $428.60 per month depending on income tier). The Part B deductible is $257. Both plans require you to pay that deductible before benefits kick in.

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The One Failure Mode That Trips Up Most Buyers

The most common mistake: choosing Plan N solely for the lower monthly premium, then getting hit by copays and excess charges that wipe out the savings.

How it fails in practice: A person on Plan N visits a primary care doctor 12 times and the ER twice (not admitted). After the $257 deductible, they pay $240 in office copays + $100 in ER copays = $340. If Plan G costs $50/month more ($600/year), Plan N still saves $260 on paper — but if that person also sees a specialist who charges a 15% excess fee (allowed in most states), each visit could cost $20 copay plus $30+ excess charge. Five such visits add another $150–$250, making Plan N the more expensive option.

How to detect it early: Run this 5-item fit check with honest answers. If you check “yes” on 4 or more, Plan G is likely cheaper overall.

5-Item Fit Check (Pass/Fail)

1. Do you visit any doctor more than 10 times per year?

• Yes → Plan G / No → Plan N

2. Do you have a chronic condition that requires 4+ specialist visits per year?

• Yes → Plan G / No → Plan N

3. Do you live in a state where Part B excess charges are allowed? (Most states; check at medicare.gov)

• Yes → Plan G / No → Plan N

4. Would an unexpected $50 ER copay cause financial strain?

• Yes → Plan G / No → Plan N

5. Do you want a single predictable monthly bill with zero surprise copays after the Part B deductible?

• Yes → Plan G / No → Plan N

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Step-by-Step Decision Flow

Use this flow to decide which plan fits your actual usage and risk tolerance. Follow the order.

1. Early Checkpoint – Are You Still in Your Medigap Open Enrollment Period?

This window opens the month you are 65 and enrolled in Part B and lasts 6 months. After it closes, you must pass medical underwriting to buy either plan. If you are inside the window, you lock in guaranteed-issue rights — use that advantage now. If you are outside, you may not be able to switch plans without a health check.

2. Gather Your Last Year’s Appointment History

Count Medicare-covered office visits (doctor, specialist, PT, etc.) and ER visits. Exclude visits for lab work alone or preventive screenings (usually $0 copay under Plan N anyway). Write down the totals.

3. Estimate Annual Cost for Each Plan

• Plan G annual cost = (Monthly premium × 12) + $257 (Part B deductible)
• Plan N annual cost = (Monthly premium × 12) + $257 + ($20 × number of office visits) + ($50 × number of non-admitted ER visits)
• Compare the two totals. The lower number is your baseline winner.

4. Check Your State’s Excess Charge Status

Go to medicare.gov or your state insurance department website. If excess charges are allowed, Plan G protects you; Plan N does not. If you live in Connecticut, New York, Pennsylvania, or Ohio (some restrictions), excess charges may be banned or rare — Plan N becomes safer.

5. Verify Your Premium Quotes

Call 2–3 insurers in your state. Ask for the same plan (G or N) to compare monthly premiums. Rates vary by age, gender, tobacco use, and sometimes ZIP code. Do not rely on a single online estimate.

6. Short Stop / Escalation Signal

• If both totals are within $200 of each other, choose Plan G for predictability.
• If Plan N is cheaper by $400+ and you expect ≤6 office visits per year and you live in a state without excess charges, Plan N is safe.
• If you feel uneasy about tracking copays or if your health changes unexpectedly, escalate to a SHIP counselor (medicare.gov/ship) for personalized advice.

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Where Plan N Makes Sense – and Where It Doesn’t

Plan N is a good fit if:

• You visit a doctor 4–5 times per year or less.
• You have a fixed income and need the lowest possible monthly premium.
• You live in a state where excess charges are banned or rarely used (verify locally).
• You can comfortably budget for $20 and $50 copays when they occur.

Plan N may be a bad fit if:

• You have multiple chronic conditions requiring frequent monitoring (e.g., diabetes, heart disease, COPD).
• You travel out of state often — ER care in a state that allows excess charges could add $50+ per visit.
• You find copay surprises stressful and prefer one predictable bill.
• You plan to see specialists who are out of network and likely to bill 15% excess charges.

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The Enrollment Timing Trap – Don’t Wait Until You’re Sick

Both Plan G and Plan N are guaranteed-issue only during your Medigap Open Enrollment Period — the 6 months starting the month you turn 65 and are enrolled in Part B. During those 6 months, no insurer can deny you or charge more for pre-existing conditions. After that, you must pass medical underwriting. A condition like high blood pressure or a prior hospitalization can mean higher premiums or outright denial.

Action step: If you are in that window now, make your choice and apply. If you are outside the window, you may still qualify for guaranteed-issue rights in limited situations (e.g., losing employer coverage, moving out of plan area). Check with your state’s SHIP office.

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Final Decision Framework

• Run the annual cost projection using your actual appointment counts. The lower total is better — but only if you can handle the monthly premium difference.
• If the totals are close, choose Plan G for zero-copay simplicity.
• If you plan to travel or move to another state, Plan G’s coverage of excess charges gives you one less variable to manage.
• Always verify premiums for your specific ZIP code at medicare.gov/plan-compare or with a licensed agent. Premiums change every year, so the 2025 numbers above are for reference only.

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Disclaimer: This article is for informational purposes only and does not constitute financial, legal, or medical advice. Medicare rules, premiums, and plan availability vary by state and change annually. Always verify current plan options and pricing at medicare.gov or with a licensed insurance agent in your state. Consult a Medicare counselor (SHIP) for personalized guidance. Your individual health needs and budget should drive your final decision.