Medicare covers sleep studies, but only when a doctor orders one to diagnose a specific sleep disorder
Medicare Part B covers a sleep study if your doctor believes you have a sleep disorder that needs diagnosis. The study must happen in a sleep lab or, in some cases, at home with equipment your doctor prescribes. Medicare will not cover a sleep study you arrange on your own or one done purely for screening when you have no symptoms.
The key requirement is a doctor's order. Your primary care doctor or a sleep specialist must refer you, document why they think you have a sleep problem, and order the test as part of your medical care. Once that happens, Medicare typically covers 80 percent of the approved cost after you meet your Part B deductible. You pay the remaining 20 percent.
Key Takeaways
- Your doctor must order the sleep study and document that you have symptoms of a sleep disorder for Medicare to cover it.
- Sleep studies in a lab and home sleep tests are both covered when medically necessary, though coverage rules differ slightly between them.
- You pay 20 percent of the Medicare-approved cost after your Part B deductible, unless you have a Medigap or Medicare Advantage plan that covers more.
- Medicare requires the sleep lab to be Medicare-certified, so ask your doctor's office whether the facility they recommend meets that requirement.
- If Medicare denies the claim, you have the right to request a review, and your doctor can appeal on your behalf.
In-Lab Sleep Studies and What Medicare Covers
An in-lab sleep study, also called polysomnography, happens overnight at a sleep center. You sleep while sensors record your brain waves, heart rate, breathing, and leg movements. Medicare covers this test when your doctor orders it to diagnose obstructive sleep apnea, narcolepsy, restless leg syndrome, or other sleep disorders.
The sleep lab must be Medicare-certified for the cost to be covered. Your doctor's office should know which labs in your area have this certification. If you go to a lab that is not certified, Medicare will not pay, and you could owe the full bill. Before you schedule, ask the lab directly: "Are you Medicare-certified?" If the answer is no, ask your doctor for a referral to one that is.
Medicare covers the technical part of the study (the equipment and technician) and the professional part (the sleep doctor's reading and report). Both are billed separately, and both count toward your deductible and 20 percent coinsurance.
Home Sleep Tests and Medicare Coverage
A home sleep test lets you wear a portable device at home instead of spending a night in a lab. The device records breathing, oxygen levels, and heart rate. Medicare covers home sleep tests when your doctor orders one, but only for diagnosing obstructive sleep apnea—not for other sleep disorders.
Your doctor must prescribe the specific device and arrange for it to be sent to your home. You wear it for one or more nights, then return it. A sleep doctor reads the results. Medicare covers this service the same way it covers an in-lab study: you pay 20 percent of the approved cost after your deductible.
Home sleep tests are often faster and less expensive than lab studies, so your doctor may suggest one first. If the home test is unclear or shows you need more detailed information, your doctor can then order an in-lab study.
What You Pay Out of Pocket
Your costs depend on whether you have met your Part B deductible for the year. In 2024, the Part B deductible is $240 (this amount changes yearly). Once you meet it, Medicare pays 80 percent of the approved cost and you pay 20 percent.
If you have not met your deductible yet, you pay the full approved cost until you reach $240, then Medicare's 80/20 split begins. The actual dollar amount you owe varies by location and which sleep lab or home test company is used, because Medicare approves different amounts in different areas.
If you have a Medigap plan, it may cover some or all of your 20 percent coinsurance. If you have a Medicare Advantage plan, your costs depend on your plan's rules—some cover sleep studies with a copay, others with coinsurance. Check your plan documents or call the plan to find out what you owe before you schedule the test.
How to Get Your Sleep Study Ordered and Covered
Start by talking to your primary care doctor about your sleep symptoms. Describe what is happening: Do you snore? Stop breathing during sleep? Wake up gasping? Feel exhausted no matter how long you sleep? Have restless legs at night? Your doctor will listen and decide whether a sleep study makes sense.
If your doctor agrees, they will write an order for the test and either refer you to a sleep specialist or directly to a Medicare-certified sleep lab. Your doctor's office should handle the referral and may need to submit paperwork to Medicare or your insurance plan before the test is scheduled. Ask the office staff: "Will you check with Medicare to make sure this is covered before I schedule?"
Once the lab or home test company receives the order, they will contact you to schedule. Confirm at that time that they are Medicare-certified and ask what your out-of-pocket cost will be based on your deductible status.
What Happens If Medicare Denies the Claim
Sometimes Medicare denies a sleep study claim, usually because the doctor's notes did not clearly document why the test was medically necessary. If this happens, you will receive a notice called an Explanation of Benefits (EOB) that explains the denial.
You have the right to request a review. You can ask your doctor's office to appeal on your behalf—they can resubmit the claim with more detailed notes about your symptoms and why the test was needed. Many denials are overturned on appeal. Your doctor's office should not charge you for this; it is part of their job to help get claims covered.
If the appeal is denied again, you can request a second review. The process takes time, but it is worth pursuing if you believe the test was medically necessary.
When Medicare Does Not Cover Sleep Studies
Medicare will not cover a sleep study if you arrange it without a doctor's order, even if you pay for it yourself and then ask Medicare to reimburse you. The order must come from your doctor before the test happens.
Medicare also does not cover sleep studies done purely for screening—for example, if you want to check your sleep quality but have no symptoms of a sleep disorder. The test must be ordered to diagnose a specific condition.
If you have a sleep study at a lab that is not Medicare-certified, Medicare will not pay. You are responsible for the full bill in that case, so always confirm certification before you go.
Frequently Asked Questions
Do I need a referral to a sleep specialist, or can my primary care doctor order the study?
Your primary care doctor can order a sleep study directly. You do not need a referral to a sleep specialist first, though your doctor may send you to one if they think you need specialized care. Either way, Medicare covers the test as long as a doctor orders it and documents the medical reason.
Will Medicare cover a second sleep study if the first one was normal?
Medicare may cover a second study if your doctor has a new medical reason—for example, if your symptoms got worse or changed. A repeat study just to confirm a normal result is usually not covered. Your doctor will need to explain to Medicare why a second test is necessary.
What if I have a Medicare Advantage plan instead of Original Medicare?
Medicare Advantage plans must cover sleep studies the same way Original Medicare does, but your out-of-pocket costs may be different. Some Advantage plans charge a copay instead of coinsurance. Call your plan before scheduling to find out what you will owe.
Can I use a fitness tracker or smartwatch instead of a sleep study?
No. Fitness trackers and smartwatches estimate sleep but do not measure the detailed information a sleep study captures. Medicare does not cover these devices as a substitute for a medical sleep study, and they cannot diagnose sleep disorders.
How long does it take to get results from a sleep study?
Results usually come back within one to two weeks. The sleep doctor reads the data and sends a report to your primary care doctor, who will discuss the findings with you and talk about next steps if a sleep disorder is found.