Yes, Medicare Part B covers a brain MRI for an Alzheimer's evaluation when a doctor orders it to diagnose cognitive decline. Coverage applies when the scan is medically necessary for that specific patient.
An Alzheimer's evaluation is a medical workup for memory loss and thinking changes. A brain MRI, or magnetic resonance imaging scan, uses magnets and radio waves to make pictures of the brain. Doctors use those pictures to guide diagnosis and treatment choices.
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.
Official resources:
- Check eligibility on Medicare’s official study page — Use this page to check the study’s participation requirements.
- Explore the official data from CMS — Use this primary source to review the underlying data.
Table of Contents
- Why does an Alzheimer's workup include brain imaging?
- When does Medicare consider the scan medically necessary?
- How much will you pay for a covered MRI?
- How can you avoid a denied bill?
Why does an Alzheimer's workup include brain imaging?
A standard Alzheimer's workup often includes structural imaging with MRI or CT. The Alzheimer's Association explains in its medical tests guide that doctors use the scan mainly to rule out other causes of symptoms.
Those other causes can look like Alzheimer's but need different treatment. A tumor, stroke, fluid buildup, or head injury can affect memory and thinking. Finding the true cause helps the doctor choose the right next step.
When does Medicare consider the scan medically necessary?
Medicare covers MRI on FDA-approved units when the scan is reasonable and necessary for diagnosis or treatment, according to the Centers for Medicare & Medicaid Services in its national MRI coverage rule. A clinician must order the scan for a specific medical problem, such as cognitive decline.
Medicare does not pay for routine screening MRIs without a medical reason. A patient request alone does not create coverage. The order must document symptoms and medical need.
How much will you pay for a covered MRI?
After you meet the Part B deductible, you typically pay 20 percent of the Medicare-approved amount in a doctor's office or independent testing facility. The Centers for Medicare & Medicaid Services states this cost rule in its diagnostic test coverage page.
A hospital outpatient MRI also carries a hospital copayment. That copayment is usually capped at no more than the Part A hospital deductible. Ask the facility whether it bills as hospital outpatient or as an office or testing facility.
How can you avoid a denied bill?
Use a Medicare-enrolled facility and confirm that the MRI supplier is accredited. For imaging outside a hospital, Medicare pays only when the supplier meets accreditation rules.
A non-accredited provider cannot bill you for the test. Confirm these details before you schedule:.
- order lists cognitive symptoms and medical reason for the MRI
- facility accepts Medicare assignment and is accredited
- deductible, coinsurance or copayment, and Medicare Advantage prior-authorization rules
