The Medicare Guide to Sleep Apnea: How Long Will Medicare Pay for CPAP Supplies and Replacements?
Managing obstructive sleep apnea should not feel like a second job. But for many Medicare beneficiaries, it increasingly does. Between logging nightly usage data, scheduling annual physician reassessments, reordering replacement parts on a rolling schedule, and paying 20% coinsurance on every supply order, staying covered under Medicare's CPAP benefit comes with a real administrative load.
The good news is that Medicare CPAP coverage has no fixed end date. It continues indefinitely as long as therapy remains necessary and you stay compliant. The challenge is understanding exactly what that requires, and whether the ongoing complexity is worth it.
This guide breaks down every layer of Medicare's CPAP rules, including how long coverage lasts, what compliance means in practice, the official CMS replacement schedule for each supply, and what happens when your machine eventually needs replacing.
Key Takeaways
- Medicare Part B covers CPAP machines and supplies indefinitely as Durable Medical Equipment (DME), provided therapy remains medically necessary and compliance requirements are met.
- After meeting the 2026 Part B deductible of $283, Medicare covers 80% of approved costs; you pay 20% coinsurance on the machine rental and all covered supplies.
- During the first 90 days, you must use the machine at least 4 hours per night on 70% of nights within any consecutive 30-day window to pass the initial compliance check.
- Medicare follows a fixed CMS replacement schedule for CPAP supplies, from disposable filters every month to the machine itself every five years.
- Daybreak's FDA-cleared custom oral appliance is an alternative that requires no compliance data tracking, no supply reordering, and no ongoing coinsurance on replacement parts.
How Long Will Medicare Pay for CPAP Supplies?
Medicare CPAP coverage has no defined expiration date. Coverage continues as long as you are actively using the device, your physician confirms the therapy is clinically beneficial, and you order supplies through a DME supplier enrolled in Medicare.
CPAP therapy falls under Medicare Part B as Durable Medical Equipment. Once you meet the annual Part B deductible, $283 in 2026, Medicare pays 80% of the approved amount for both the machine rental and all covered accessories. You are responsible for the remaining 20% coinsurance on each eligible supply order.
For patients enrolled in a Medicare Advantage plan (Part C), your plan must cover at least the same benefits as Original Medicare, but prior authorization requirements and supplier network rules may differ. Always confirm your specific plan's requirements before ordering supplies or equipment.
For a broader look at how sleep apnea is covered by insurance beyond Medicare, including commercial plans, Daybreak has a full breakdown worth reviewing.
The Initial Trial Period and Adherence Guidelines
Medicare requires a mandatory 12-week trial period for CPAP coverage. During this time, the machine and necessary accessories are covered at the standard 80/20 split after your deductible. The trial exists to confirm that you are actively using therapy and that it is delivering measurable clinical benefit.
The compliance benchmark Medicare applies is precise:
- Usage requirement: At least 4 hours per night on 70% of nights, a minimum of 21 out of every 30 nights, within any consecutive 30-day window during the first 90 days
- Physician reassessment: A formal review must occur between day 31 and day 91, during which your doctor documents both usage data and clinical benefit
- Data transmission: Modern CPAP machines record and upload usage data automatically, which your physician and Medicare can review remotely
If compliance is confirmed, Medicare continues coverage. If not, coverage can be paused or revoked, and requalification may require a new sleep study and a full restart of the trial.
Many people with sleep apnea find this level of monitoring difficult to sustain consistently, making CPAP alternatives worth exploring, since oral appliances require no compliance tracking to maintain care.
Ongoing Medicare Part B Cost Sharing
After clearing the initial trial, Medicare moves to a 13-month rental-to-ownership model for the CPAP machine:
- During the 13-month rental: Medicare pays 80% of the monthly rental cost; you pay 20% coinsurance each month
- After 13 months: Continuous use is confirmed, and you own the machine outright at no additional cost
- Ongoing supplies: Medicare continues covering 80% of all replacement supplies on the CMS schedule; 20% coinsurance applies to every supply order for as long as you remain on CPAP therapy
Items not covered regardless of medical necessity include mask liners, CPAP pillows, and cleaning devices. These fall outside Medicare's approved DME list and must be paid entirely out of pocket.
How Often Will Medicare Replace CPAP Supplies?
Medicare follows a precisely structured replacement schedule for every component of a CPAP setup. The schedule reflects the clinical lifespan of each part: silicone seals degrade, tubing develops micro-cracks, and filters clog - all of which reduce pressure effectiveness and create hygiene risks over time.
Medicare will only cover replacement supplies if you are actively using your CPAP machine and your physician's records reflect ongoing therapy. Ordering replacements without documented active use is one of the most common reasons for claim denials under the DME benefit.
Replacement Timelines for Masks, Tubing, and Filters
The table below outlines official CMS maximum replacement frequencies for each covered CPAP supply category, based on Local Coverage Determination L33718 for Positive Airway Pressure devices:
| Supply | Medicare replacement frequency | Clinical Reason |
|---|---|---|
| Disposable filters | 2 per month | Clogged filters reduce airflow and pressure performance |
| Nasal cushions / nasal pillows | 2 per month | Silicone seals degrade and cause air leaks |
| Full-face cushions | 1 per month | Larger contact surface degrades faster with nightly use |
| Mask frame | 1 per 3 months | Plastic becomes brittle and loses structural integrity |
| Tubing | 1 per 3 months | Micro-cracks collect bacteria and reduce airflow consistency |
| Headgear and chinstrap | 1 per 6 months | Elastic stretches and loses fit, causing mask leaks |
| Humidifier water chamber | 1 per 6 months | Mineral buildup and pitting can harbor bacteria |
| CPAP machine | Every 5 years (RUL) | CMS Reasonable Useful Lifetime limit; earlier only for loss, theft, or irreparable damage |
These are maximum frequencies. Medicare will not cover replacements ordered ahead of schedule unless there is documented damage or a specific clinical necessity. Many DME suppliers offer auto-replenishment programs that ship supplies automatically when each window opens, reducing the tracking burden.
The cumulative coinsurance on all of these parts represents a consistent out-of-pocket commitment year after year. Daybreak's custom oral appliance, by contrast, has a long structural lifespan with no revolving replacement cycle.
Replacing Your CPAP Machine Every Five Years
The CPAP machine itself carries a Reasonable Useful Lifetime (RUL) of five years under CMS guidelines. After five years, you are eligible for a brand-new machine at the standard 80/20 rate, but only after a treating physician conducts a fresh in-person evaluation documenting that you continue to use and benefit from PAP therapy.
Medicare will cover an early replacement only under these specific, documented circumstances:
- Documented theft, supported by a police report or equivalent record
- Documented loss under qualifying conditions (i.e. natural disaster like a fire or a flood)
- Accidental damage that is both irreparable and the result of a specific incident
Routine wear and gradual degradation do not qualify. If your machine malfunctions within the five-year window, Medicare may cover repair costs up to a defined limit. If repair costs exceed that threshold, an early replacement may be considered on a case-by-case basis with supporting documentation.
Do I Need a New Prescription to Get a New CPAP Machine?
Yes, when your CPAP machine reaches its five-year RUL and you request a replacement, Medicare requires a new in-person clinical evaluation with your treating physician. The physician must document that you are still actively using PAP therapy and that it continues to deliver clinical benefit.
Key things to know about the prescription and renewal process:
- New sleep study: Not automatically required if your original diagnostic records are comprehensive. However, if circumstances have changed significantly, such as substantial weight loss or new comorbidities, your physician may recommend a new study to confirm current therapy settings are still appropriate
- Annual prescription renewal: Required separately from the five-year machine evaluation. Medicare requires a prescription signed within the past 12 months for DME suppliers to continue processing covered supply orders
- Scope of renewal: Applies year to year for all covered accessories such as filters, cushions, tubing, mask frames, headgear, and humidifier chambers
Let Daybreak Simplify Your Sleep Apnea Treatment
While Medicare provides dependable lifelong coverage for your sleep apnea supplies, it requires a permanent commitment to strict compliance audits, routine doctor visits, and ongoing out-of-pocket costs. Navigating this endless cycle of data tracking and paperwork is the only way to keep your machine covered.
Ready to leave compliance tracking behind and experience a simpler path to better sleep? Daybreak offers custom-made mandibular advancement devices for patients who are appropriate candidates.
FAQs on Medicare CPAP Coverage and Alternatives
How much does a CPAP machine cost with Medicare?
After your deductible's met, the Medicare-approved monthly rental rate for a standard machine typically ranges from $40 to $80. Your 20% coinsurance will cost you between $8 and $16 per month during the 13-month rental period.
Related accessories like masks and hoses will add separate, recurring coinsurance fees to your statements.
Does Medicare Part B have a maximum out-of-pocket limit for CPAP supplies?
No. Original Medicare Part B doesn't have an annual out-of-pocket maximum limit, meaning your 20% coinsurance responsibility continues indefinitely on every supply order.
These recurring fees will accumulate year after year unless you carry a secondary supplemental insurance policy like Medigap to absorb the costs.
Can I switch from a Medicare CPAP setup to a Daybreak custom oral appliance?
Yes. Daybreak currently operates exclusively within private commercial insurance networks and doesn't bill Medicare or Medicaid.
If you're currently covered under a commercial plan or have private secondary insurance outside of your government benefits, Daybreak can evaluate your sleep history to help you transition to an oral appliance.
Does failing the initial 90-day Medicare compliance window prevent me from getting an oral appliance?
Not at all. Failing a Medicare CPAP compliance check only restricts your coverage for positive airway pressure devices under the government benefit framework.
Because custom oral appliances use a completely separate anatomical mechanism to keep your airway open naturally, your past compliance history with a machine won't prevent you from qualifying for an appliance.