There is no single reliable U.S. patient price for memantine; Medicare costs vary by plan and pharmacy, according to Medicare.gov's 2026 cost overview.
Before filling it, verify the plan's formulary, coverage rules, network pharmacy, deductible status, and exact quoted charge. Memantine tablets are FDA-labeled for moderate-to-severe dementia of the Alzheimer's type, as shown in the FDA label published by DailyMed. Coverage for another dementia may require plan-specific clinical review.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What determines the cost?
- Will the plan cover memantine?
- Which restrictions should you check?
- Can assistance or payment options help?
- A practical verification checklist
What determines the cost?
A Medicare Part D plan may cover generic or brand-name prescriptions, but its formulary determines whether the prescribed memantine product is covered. A formulary is the plan's list of covered drugs. The amount owed can depend on the deductible, the drug's cost-sharing tier, and the pharmacy used. A preferred in-network pharmacy may charge less under the plan's rules.
At an out-of-network pharmacy, the patient may initially have to pay the full drug cost. For 2026, a Part D deductible cannot exceed $615. After the deductible, standard initial-coverage coinsurance is 25% until covered-drug out-of-pocket spending reaches $2,100; covered drugs then cost $0 for the rest of the calendar year, according to Medicare.gov's Part D cost guidance. These thresholds are not an individual price quote.
Will the plan cover memantine?
Check the exact plan rather than asking whether "Medicare covers memantine." Medicare Part D can help pay for prescriptions, but each plan controls its own formulary and coverage conditions. The diagnosis may matter. The FDA label covers moderate-to-severe dementia of the Alzheimer's type.
If memantine is prescribed for another dementia, ask whether the plan requires clinical review or supporting information from the prescriber. Also verify the exact product on the prescription. Coverage for one memantine product does not by itself confirm the cost or rules for every product, strength, or quantity.
Which restrictions should you check?
A covered drug can still carry conditions. CMS says Part D plans may use cost-sharing tiers, prior authorization, quantity limits, or step therapy. Prior authorization means the plan wants approval before covering the drug.
A quantity limit restricts how much it will cover, while step therapy may require trying another covered treatment first. An enrollee, prescriber, or authorized representative can request a coverage or tiering/formulary exception under CMS coverage-determination rules. Ask the plan which restriction applies and what supporting information it requires.
Can assistance or payment options help?
Medicare Extra Help can reduce Part D expenses for people who meet income and resource requirements. In 2026, it can provide a $0 premium and deductible and limit a generic prescription to as much as $5.10 at participating pharmacies, according to Medicare.gov's Extra Help information.
The Medicare Prescription Payment Plan serves a different purpose. It spreads a Part D enrollee's out-of-pocket prescription expenses into capped monthly payments, but it does not reduce the drug's total cost. These programs address different problems: Extra Help can lower eligible costs, while the payment plan changes when those costs are paid.
A practical verification checklist
Contact the plan and pharmacy with the prescription details available. Ask for answers tied to the current coverage year.
Medicaid also requires state-specific verification. States cover outpatient prescription drugs for categorically eligible people and most other enrollees, but each state publishes its own coverage and reimbursement approach. Check the applicable state's materials rather than relying on another state's memantine rules.
- Is the prescribed memantine product on the formulary?
- Which cost-sharing tier applies?
- Is prior authorization, step therapy, or a quantity limit required?
- What will the preferred in-network pharmacy charge?
- How much of the deductible remains?
