Medicare is comprehensive for medically necessary hospital and physician care, but it has important exclusions that surprise many new enrollees. Knowing what Medicare does not cover, before you need it, lets you plan for these gaps through supplemental coverage, Medicare Advantage extras, or separate insurance. The gaps are not random; most reflect the program's 1965 design, which focused on acute medical care and excluded services considered routine or custodial at the time.
The dental, vision, and hearing gap is the one that surprises people most because they assumed Medicare covered "everything medical." The long-term care gap is the one with the biggest financial consequences. And the drug gap, people who skip Part D and then face a prescription bill, is the one with a permanent financial penalty attached. Knowing the gaps before you enroll means your supplemental coverage decision is actually addressing the right problems.
Routine dental care
Original Medicare does not cover routine dental services including cleanings, x-rays, fillings, extractions, crowns, bridges, dentures, or implants. The only exception is dental care that is medically necessary and directly connected to a covered medical procedure, for example, a tooth extraction before radiation therapy for head and neck cancer. Routine preventive dental care and restorative dental work are excluded regardless of how necessary they are for overall health. Medicare Advantage plans often include dental benefits, though quality and coverage depth vary significantly by plan.
Routine vision care and eyeglasses
Original Medicare does not cover routine eye exams for glasses prescriptions, eyeglasses, or contact lenses. The exception is eyeglasses following cataract surgery with intraocular lens implantation, one pair is covered. Treatment for eye diseases such as glaucoma, macular degeneration, and diabetic retinopathy is covered as medically necessary ophthalmology care under Part B. Routine optometry is not. Medicare Advantage plans often include vision benefits with annual exam coverage and a frames or contacts allowance.
Hearing aids and routine hearing exams
Original Medicare does not cover hearing aids or the audiology exams used for hearing aid fittings. Diagnostic hearing exams ordered by a physician to investigate a medical condition, suspected tumor, sudden hearing loss, or other medical reason, are covered under Part B. Routine hearing exams for the purpose of fitting hearing aids are not. Medicare Advantage plans often include hearing benefits with an annual exam and hearing aid allowance.
Long-term custodial care
Medicare covers skilled nursing facility care for up to 100 days per benefit period following a qualifying hospital stay. It does not cover ongoing custodial care, the personal assistance with daily activities that constitutes most of what nursing homes and home care agencies provide long-term. Assisted living facility costs, memory care unit fees, ongoing personal care aide services at home, and nursing home care beyond the 100-day Medicare SNF benefit are not covered. Long-term care is the largest coverage gap in Medicare and the primary reason long-term care insurance and Medicaid planning exist.
Trying to understand what your Medicare covers before you need care?
The gaps in Original Medicare drive most supplemental coverage decisions. I can help you figure out whether Advantage or Medigap is the better way to fill the gaps that matter for your specific situation.
Book a Free CallCosmetic surgery and procedures
Medicare does not cover procedures performed primarily for appearance rather than medical necessity. Cosmetic surgery, Botox for wrinkles, cosmetic fillers, cosmetic laser treatments, and elective procedures without a medical indication are excluded. Exceptions exist for reconstructive procedures following medically necessary surgeries, breast reconstruction following mastectomy, for example, and for certain Botox uses treating diagnosed medical conditions including blepharospasm, cervical dystonia, and hyperhidrosis.
Most care outside the United States
Original Medicare does not cover medical care received in foreign countries with limited exceptions. Care received in U.S. territories is covered. Emergency care on a ship within six hours of a U.S. port is covered. Medigap Plans C, D, F, G, M, and N cover foreign travel emergency care at 80% (after a $250 deductible) up to a $50,000 lifetime maximum.
Prescription drugs under Original Medicare
Original Medicare Part A and Part B do not include prescription drug coverage. Part D must be purchased separately or obtained through a Medicare Advantage plan with drug coverage. Without Part D or MA-PD coverage, Medicare does not pay for prescriptions, a significant gap for most beneficiaries. Failing to enroll in Part D when first eligible triggers a permanent late enrollment penalty.
Frequently asked questions