If you or someone you care for has been diagnosed with obstructive sleep apnea, you may be wondering whether Medicare helps pay for continuous positive airway pressure therapy. The short answer is often yes: Medicare may cover a CPAP machine, related supplies, and the medical visits and tests used to diagnose sleep apnea when coverage rules are met. This guide explains what Medicare generally covers, who qualifies, how rental and purchase work, what supplies are included, and what costs you may face. It is general information, not personal medical or billing advice.
In this article, you will learn:
- How Medicare Part B treats CPAP machines as durable medical equipment
- The documentation and adherence requirements that support coverage
- How CPAP supplies and replacement schedules are handled
- What you may pay under Original Medicare and Medicare Advantage
- Practical steps to take before ordering equipment
What CPAP therapy is and why it is used
CPAP therapy is a common treatment for obstructive sleep apnea, a condition in which breathing repeatedly stops or becomes shallow during sleep. A CPAP machine delivers a steady flow of air through a mask to help keep the airway open. For many people, it improves sleep quality, daytime alertness, and overall health. A doctor or sleep specialist usually recommends CPAP after a sleep study and a review of symptoms and health history.
Does Medicare cover CPAP machines?
Original Medicare, specifically Part B, generally covers CPAP machines as durable medical equipment, or DME. DME is equipment that is medically necessary, used for a medical purpose, durable enough to be reused, and appropriate for use in the home. A CPAP machine can meet those rules when it is prescribed to treat diagnosed obstructive sleep apnea and is supplied by a Medicare-enrolled supplier.
Coverage is not automatic. Medicare expects the equipment to be medically necessary for your specific situation and expects your doctor to document that need. If you have a Medicare Advantage plan, the plan must cover at least the same services as Original Medicare, but it may apply its own rules for suppliers, prior authorization, and cost sharing.
Coverage requirements for a CPAP machine
Medicare generally looks for several key pieces of information before it will cover CPAP therapy. Exact rules can change, and your supplier and doctor should confirm current requirements, but the common elements include:
- A diagnosis of obstructive sleep apnea. Medicare generally expects a sleep test or other accepted clinical evaluation that confirms the diagnosis. CPAP is not usually covered for snoring alone or for symptoms that have not been evaluated.
- A prescription and medical need. Your treating doctor must document that CPAP is medically necessary and order the equipment. A face-to-face visit and clinical records are often part of this process.
- A Medicare-enrolled supplier. The company providing the machine and supplies should be enrolled in Medicare and willing to bill Medicare. Using an unenrolled supplier can affect coverage and costs.
- Follow-up and adherence. Medicare generally requires you to use the machine as prescribed and to have your use reviewed. For continued coverage, suppliers and doctors often review usage data. A common standard is use of at least 4 hours per night on 70 percent of nights over a 30-day period, but your doctor and supplier should explain the specific expectations for your plan.
Your doctor may also need to see you for follow-up during the early months of therapy. These visits help confirm that the machine is helping, that the mask fits properly, and that you are using the equipment safely.
How Medicare covers CPAP: rental and ownership
Under Original Medicare, a CPAP machine is often covered through a rental period rather than a single purchase. The rental period can last up to about 13 months. During that time, you may pay coinsurance for the rental. If you continue to meet coverage requirements and use the machine as prescribed, you may become the owner of the machine at the end of the rental period. Your supplier should explain whether your machine is being rented, purchased, or handled under a different arrangement.
Medicare Advantage plans may handle equipment differently. Some plans use rental, some use purchase, and some require prior authorization. Always ask the plan and supplier how the machine will be billed before you accept it.
Does Medicare cover CPAP supplies?
Medicare generally covers CPAP supplies when the machine itself is covered and the supplies are medically necessary. Common covered supplies can include masks, headgear, tubing, filters, and humidifier chambers. Supplies are usually replaced on a set schedule or when they are worn out, damaged, or no longer working properly. Medicare does not generally pay for extra supplies simply because you want a spare set, and it does not cover supplies from a supplier that does not meet Medicare billing rules.
Keep track of when you receive supplies and when replacements are due. Your supplier can help you understand the replacement schedule, but you should also review your Medicare statements to make sure billed items match what you received.
What you may pay
With Original Medicare Part B, you generally pay the Part B deductible first, then 20 percent of the Medicare-approved amount for covered CPAP equipment and supplies. Medicare pays the remaining 80 percent, assuming the supplier accepts assignment. If a supplier does not accept assignment, you may pay more. A supplemental insurance policy may help with some of your share, but it does not add CPAP coverage on its own.
Costs can vary with Medicare Advantage plans. Depending on the plan, you may have a copay, coinsurance, or a prior authorization requirement. Ask the plan for a written estimate before ordering equipment. Also ask whether the supplier is in the plan’s network.
What Medicare generally does not cover
Medicare generally does not cover CPAP equipment or supplies when:
- The diagnosis is not documented or the equipment is not considered medically necessary
- You have not had the required evaluation or follow-up
- The supplier is not enrolled in Medicare or does not bill Medicare correctly
- You request supplies earlier than the replacement schedule allows
- The equipment is for comfort, convenience, or travel only and does not meet DME rules
Medicare also does not cover every sleep-related service. A sleep study may be covered when medically necessary, but coverage depends on the reason for the test and the setting. Your doctor can explain whether a test is appropriate and how it should be billed.
Practical steps before getting CPAP through Medicare
- Talk with your doctor. Confirm the diagnosis, ask whether CPAP is medically necessary, and make sure your records are complete.
- Ask about the sleep test. Find out whether the test is covered and what documentation it provides.
- Choose a Medicare-enrolled supplier. Ask whether the supplier accepts assignment and whether it is in network for a Medicare Advantage plan.
- Ask how the machine will be billed. Clarify rental versus purchase, the expected rental period, and what happens at the end.
- Understand adherence reviews. Ask how usage data will be shared and what you need to do if you have trouble using the machine.
- Keep records. Save prescriptions, receipts, and Medicare statements, and review them for accuracy.
The bottom line
Medicare often covers CPAP machines and supplies when they are medically necessary for diagnosed obstructive sleep apnea, prescribed by a treating doctor, and provided by a Medicare-enrolled supplier. Original Medicare generally covers the machine through a rental period and covers replacement supplies on a set schedule. You may still pay a deductible, coinsurance, or plan copays, and Medicare Advantage plans may have their own rules.
If you are considering CPAP therapy, start with your doctor and ask your supplier to explain coverage before you order. For more plain-language guidance on sleep health, equipment, and navigating care, explore related health topics on our website.