The gap map

The 10 things Medicare doesn’t cover, and the realistic fix for each

Short answer: Original Medicare’s big exclusions are routine dental, routine vision, hearing aids, long-term custodial care, care outside the U.S., and pharmacy prescriptions (without Part D). Some gaps have cheap fixes, some have expensive ones, and one has no insurance fix at all. Here’s the complete map with honest prices.

By the Medicare Decoder team · Updated August 10, 2026 · 4-minute read · Figures are official 2026 amounts

Key takeaways

The headline exclusions: routine dental, routine vision, hearing aids, long-term custodial care, most overseas care, and pharmacy drugs without Part D.
Advantage plans patch several gaps with capped allowances; price those extras at their caps, not their headlines.
The most dangerous "gap" isn’t an exclusion at all: it’s the uncapped 20% coinsurance inside Part B.
Long-term care is the gap with no easy fix: Medicare never covers it, and the real payers are savings, LTC insurance, and Medicaid.
Every specific service can be checked in seconds at Medicare.gov’s official coverage tool.

Jump to The 10 gaps The gap inside the coverage How to check anything FAQ

The 10 gaps, each with its fix

Not covered	What that means	The realistic fix
Routine dental	No cleanings, fillings, crowns, dentures	Advantage dental caps, standalone insurance, discount plans, cash (details here)
Routine vision	No eye exams for glasses, no frames or lenses	Pay cash ($100–300/yr typical), Advantage allowances; medical eye care IS covered (here)
Hearing aids	$0 toward devices or fitting exams	OTC aids ($200–$1,700/pair), Advantage allowances (here)
Long-term custodial care	No help with bathing, dressing, supervision beyond short skilled stays	Savings, LTC insurance bought early, Medicaid after spend-down (here)
Care outside the U.S.	Essentially none, narrow border exceptions	Medigap plans C–G/M/N cover 80% of emergencies abroad; travel medical insurance for trips
Pharmacy prescriptions	Original Medicare alone covers almost none	A Part D plan, even a cheap one, from day one
Cosmetic surgery	Not covered unless reconstructive after injury/illness	Cash; confirm reconstructive coding before assuming
Routine foot care	Nail trimming, callus care excluded (diabetic foot care IS covered)	Cash; podiatry for medical conditions is Part B
Acupuncture (mostly) and alternative care	Narrow exception: chronic low back pain acupuncture is covered within limits	Cash, or an Advantage plan that adds it
Missed the fine print items	Concierge fees, most chiropractic beyond spinal manipulation, medical marijuana	Cash, and read before assuming

Exclusions per the Medicare statute and Medicare.gov; Advantage extras vary by plan and are capped.

The gap hiding inside the coverage

The exclusion list gets the attention, but the most financially dangerous hole is inside covered care: Part B pays 80% of approved outpatient costs and leaves you 20% with no annual maximum. Everything on the list above is a budgetable expense; the uncapped 20% is the one that can be $40,000 in a bad year. That’s the gap Medigap exists to close and the Advantage out-of-pocket maximum exists to cap, and it’s why "I’ll just have Original Medicare alone" is the one configuration almost no one should choose on purpose.

How to check any specific service in 30 seconds

Medicare.gov runs an official lookup, "Is my test, item, or service covered?": type the service, get the answer, including the conditions attached. It beats every forum thread and every phone tree. For drugs, the equivalent is running the specific prescription through the plan finder against real formularies. When a bill surprises you anyway, remember the two-step: first check whether the service was covered at all, then check whether it was billed under the part you expected, because the A/B border explains many "denials" that are really status questions.

Questions people also ask

What are the main things Medicare doesn’t cover?

Routine dental care, routine vision (exams for glasses, frames, lenses), hearing aids, long-term custodial care, care outside the U.S. (with narrow exceptions), and pharmacy prescriptions unless you add Part D. Cosmetic surgery and routine foot care are also excluded.

Does Medicare cover you when traveling overseas?

Essentially no; Original Medicare covers care outside the U.S. only in narrow border situations. Medigap plans C through G, M, and N cover 80% of emergency care abroad after a $250 deductible, and trip-specific travel medical insurance fills the rest.

Does Medicare Advantage cover the things Original Medicare excludes?

Partially. Most Advantage plans add capped dental, vision, and hearing allowances, and sometimes extras like acupuncture. The benefits are real but bounded, typically worth their annual caps, and they don’t touch the biggest gap, long-term custodial care.

What is the biggest gap in Medicare coverage?

Financially, two: long-term custodial care, which Medicare never covers and which can cost six figures a year, and the uncapped 20% coinsurance on Part B services, which is why nearly everyone pairs Original Medicare with either a Medigap plan or an Advantage plan’s out-of-pocket maximum.

How do I find out if Medicare covers a specific procedure?

Use Medicare.gov’s official coverage lookup tool, which answers by service name and lists any conditions. For prescription drugs, run the exact drug through the Medicare Plan Finder against your plan’s formulary.

Sources for this article

Medicare.govIs my test, item, or service covered?: the official service-by-service answers behind this list.
Medicare.govMedicare.gov: the published list of services Original Medicare doesn’t cover.
CMS.gov2026 premiums and deductibles: the cost-sharing structure the 20% gap lives in.

Figures checked against these sources in August 2026. We update within weeks when CMS publishes new amounts.

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