Medicare covers many Alzheimer’s-related medical services, from diagnostic testing to prescription drugs, but it does not pay for the type of care most people with Alzheimer’s eventually need most: long-term custodial care like help with bathing, dressing, and eating. Understanding where Medicare’s coverage starts and stops is essential for planning, because the average person with Alzheimer’s needs care for four to eight years after diagnosis, and the costs that fall outside Medicare can easily reach six figures.
What Original Medicare Covers
Medicare Part B pays for a dedicated cognitive assessment visit where a provider reviews your cognitive function, confirms or establishes a dementia diagnosis, and creates a care plan. This visit can include a medication review, identification of caregiver support needs, referrals to specialists, and connections to community resources like adult day programs and support groups. Your provider can also screen for cognitive changes during your annual wellness visit at no extra cost.
After you meet the Part B deductible ($257 in 2025), you pay 20% of the Medicare-approved amount for most outpatient services. That 20% coinsurance applies to doctor visits, outpatient therapies, and other Part B services related to Alzheimer’s care. Part A covers inpatient hospital stays under its own deductible and coinsurance structure.
Medicare also covers medically necessary brain imaging, including amyloid PET scans that detect the protein plaques associated with Alzheimer’s. These scans are covered under a national coverage determination when they’re part of the diagnostic workup for cognitive impairment, though your provider needs to document the clinical rationale.
Skilled Nursing Facility Stays
If someone with Alzheimer’s is hospitalized for at least three days and then needs skilled nursing care, Medicare Part A covers up to 100 days per benefit period in a skilled nursing facility. The first 20 days cost nothing beyond the initial Part A deductible of $1,736 in 2026. Days 21 through 100 carry a daily coinsurance of $217. After day 100, Medicare pays nothing, and you’re responsible for the full cost.
The critical distinction here is that Medicare only pays for skilled care, meaning services like physical therapy, wound care, or medication management that require trained professionals. Once the person’s condition stabilizes and they only need help with daily activities like eating, bathing, or getting dressed, Medicare considers that custodial care and stops paying. For many Alzheimer’s patients, that transition happens well before the 100-day limit runs out.
Home Health Services
Medicare covers part-time skilled nursing and therapy services delivered at home when a doctor certifies the patient is homebound and needs skilled care. For someone with Alzheimer’s, this might include a nurse managing medications or a therapist working on mobility and safety. Home health aides who provide personal care (bathing, grooming) can be covered, but only when they’re part of a plan that also includes skilled services.
What Medicare does not cover is a home health aide who simply provides companionship or helps with daily tasks without a skilled-care component. This is the type of help many Alzheimer’s families need most, especially as the disease progresses, and it falls squarely outside Medicare’s coverage.
Prescription Drug Coverage Under Part D
Medicare Part D plans cover Alzheimer’s medications, but how much you pay depends entirely on which plan you choose. Plans vary in which drugs they include on their formulary, which tier those drugs sit on, and what cost-sharing they require. Some plans impose prior authorization, step therapy (requiring you to try a cheaper drug first), or quantity limits on Alzheimer’s medications.
When comparing Part D plans, check whether your specific drugs are covered at the doses prescribed. A plan that looks affordable based on its premium might place your medication on a higher cost-sharing tier, making it more expensive overall. The Medicare Plan Finder tool lets you enter your prescriptions and compare estimated annual costs across plans in your area.
Newer Anti-Amyloid Treatments
Medicare covers FDA-approved monoclonal antibody treatments that target amyloid plaques in the brain, but with significant restrictions. These newer infusion therapies are only covered for people diagnosed with mild cognitive impairment due to Alzheimer’s or mild Alzheimer’s dementia, not moderate or advanced disease.
Coverage also comes with a registry requirement. The prescribing clinician must submit patient data through a CMS portal at the start of treatment and every six months for up to two years, totaling five assessments. This “coverage with evidence development” approach means Medicare is paying for the treatment while simultaneously collecting real-world data on how well it works. Several approved registries are already operating, run by organizations including the Alzheimer’s Association and academic medical centers. Your treatment facility needs to participate in one of these registries for Medicare to cover the drug.
Even with coverage, the 20% Part B coinsurance on these treatments can be substantial given their high list prices. A Medigap policy or Medicare Advantage plan can help offset that cost.
The Long-Term Care Gap
The biggest financial reality families face is that Medicare does not pay for long-term custodial care. Federal law specifically excludes custodial care expenses from Medicare coverage (with a narrow exception for hospice). This means the round-the-clock supervision, help with eating and toileting, and memory care facility stays that define later-stage Alzheimer’s are not covered.
Most families bridge this gap through some combination of unpaid family caregiving, personal savings, long-term care insurance (if purchased before diagnosis), and eventually Medicaid for those who qualify based on income and assets. Memory care facilities typically cost $5,000 to $7,000 per month or more, and those costs come entirely out of pocket unless Medicaid or private insurance covers them.
The GUIDE Model for Caregiver Support
A newer Medicare pilot program called the GUIDE Model (Guiding an Improved Dementia Experience) launched in July 2024 and will run for eight years. It provides coordinated dementia care through interdisciplinary teams, including care navigation, 24/7 access to a support line, and caregiver training.
One of the most practical benefits is up to $2,500 per year in respite care, which temporarily relieves unpaid caregivers so they can rest. That money can go toward in-home care, adult day programs, or short-term facility-based respite. The program operates through enrolled provider organizations, so availability depends on whether a participating dementia care program exists in your area. Organizations in the “new program” track began delivering services in July 2025.
Medicare Advantage and Special Needs Plans
Medicare Advantage plans must cover everything Original Medicare covers but can add supplemental benefits. Some plans include limited dental, vision, hearing, transportation to medical appointments, or even meal delivery, all of which can matter for someone managing Alzheimer’s.
Chronic Condition Special Needs Plans (C-SNPs) go a step further. These are Medicare Advantage plans designed specifically for people with particular chronic conditions, and some are tailored to dementia. C-SNPs coordinate care across providers, customize their drug formularies for the conditions they serve, and build in care management services. If a C-SNP for dementia is available in your area, it can simplify the logistics of managing multiple providers and prescriptions. You can search for available SNPs during Medicare’s open enrollment period or when you first qualify for a Special Enrollment Period.
Estimating Your Total Out-of-Pocket Costs
For the medical services Medicare does cover, your costs under Original Medicare typically include the Part B deductible ($257 in 2025), 20% coinsurance on outpatient services, and Part D drug copays or coinsurance. A Medigap supplemental policy can cover most or all of that 20% coinsurance, which becomes especially important if you’re receiving expensive infusion treatments or frequent specialist visits.
The far larger financial exposure is the custodial and long-term care that Medicare excludes entirely. Families spending down assets to qualify for Medicaid is common in later stages of the disease. Planning early, ideally soon after diagnosis, gives you more options for structuring finances, exploring long-term care insurance (if still available), and understanding your state’s Medicaid eligibility rules for nursing home coverage.