Replace CPAP filters every two weeks; cushions and pillows every month; tubing and mask frames every three months; and headgear, chinstraps, and water chambers every six months. Your machine itself lasts about five years. That's the whole schedule. The rest of this guide explains the why behind every date, what to watch for, and what Medicare covers.
Staying on schedule keeps your seal tight, your air clean, and your CPAP therapy working, and clean gear lasts longer.
CPAP Replacement Schedule: Every Part at a Glance
Two numbers matter for every part: the manufacturer's guideline and what Medicare allows. They're not always the same, and where they differ, Medicare is usually the more generous of the two.
| CPAP Part | Guideline | Medicare Allows | Watch For |
|---|---|---|---|
| Disposable filters | Every 2 weeks | 2 per month | Gray color, dust buildup |
| Reusable foam filter | Wash weekly, replace every 6 months | 1 per 6 months | Tears, permanent discoloration |
| Full-face mask cushion | Every month | 1 per month | Leaks, slick or yellowed silicone |
| Nasal cushion | Every month | 2 per month | Leaks, loss of bounce |
| Nasal pillows | Every month | 2 per month | Nostril irritation, loose fit |
| Mask frame | Every 3 months | 1 per 3 months (with the mask interface) | Warping, cracks |
| Complete mask | At least every 6 months | 1 per 3 months | Leaks that a new cushion does not fix |
| Tubing (standard or heated) | Every 3 months | 1 per 3 months | Tiny cracks, musty smell |
| Headgear | Every 6 months | 1 per 6 months | Stretched straps, weak Velcro |
| Chinstrap | Every 6 months | 1 per 6 months | Lost elasticity, dry mouth returns |
| Humidifier water chamber | Every 6 months | 1 per 6 months | Scale, cloudiness, cracks |
| CPAP machine | About every 5 years | New device per Medicare lifetime rules | Rising noise, inconsistent pressure |
The guideline column follows ResMed's official replacement guidance [1], and the Medicare column follows CMS LCD L33718 [2].
Not sure which part fits your setup? Our Part Finder narrows it down for you. And if you're ready to restock, our CPAP supplies collection has everything on the table above.
Why Worn-Out Supplies Sabotage Your Therapy
Materials fail quietly. Silicone loses its grip, plastic stiffens, filters clog, and invisible films of bacteria build up where soap can't reach. Nothing looks broken, but the pressure your machine sends stops arriving intact.
A worn cushion leaks, and leaks bleed off the pressure that holds your airway open, so apneas slip through even with perfect habits. Research comparing mask interfaces links leak and fit problems directly to weaker therapy [5], and a review of CPAP interfaces found that the type and condition of the interface affects both effectiveness and adherence [6].
Bacteria are the second reason. Studies show CPAP humidifiers and tubing become bacterially contaminated with use, and that filters measurably reduce that transmission [3]. A 2024 analysis measured the contamination that builds up across a disassembled CPAP devices [4]. That's why fresh filters and on-schedule chamber and tubing swaps are hygiene, not vanity.
Your leak rate and AHI live in your machine data. Our guides on how to read OSCAR CPAP charts and reading your myAir score walk you through checking your own numbers. If leaks persist even with fresh supplies, our guide on how to reduce CPAP mask leaks covers what to try next.
"Silicone loses elasticity, plastic stiffens, filters clog, biofilms form at a microscopic level."
— Lilly Perez, Registered Respiratory Therapist, Sleeplay
"You're wearing CPAP, but the therapy is leaking away."
How Often to Replace Each CPAP Part
Here's the why and the when for each part, in the order you'll replace them most often. Every date matches the master table above.
CPAP Filters
Your filter is the first line of defense, catching dust and allergens before they reach your lungs. Disposable filters clog after about two weeks and should be changed then. Reusable foam filters get washed weekly and replaced around the six month mark. A clogged filter both worsens the air you breathe and makes the motor work harder. Medicare allows two disposable filters a month. Find both types in our CPAP filters collection.
Mask Cushions and Nasal Pillows
Replace the cushion or pillows every month. The soft silicone that forms your seal is broken down by facial oils and headgear pressure, and once it loses its bounce you get leaks and red marks. Signs it's past its prime: you keep tightening the headgear, the silicone looks thin or yellowed, or your skin is irritated where the mask sits. Medicare allows nasal cushions and pillows twice a month and full face cushions monthly, so replacing on schedule stays within your covered quantities (what you pay depends on your deductible and coinsurance). Shop cushions and pillows.
Mask Frame
The frame holds the cushion in place. Replace it every 3 months, or sooner if it warps, cracks, or feels unstable. A compromised frame keeps even a brand-new cushion from sealing. Browse frames.
Headgear and Chinstrap
Headgear provides the gentle tension that holds the mask secure. Replace it every six months, or when the straps are stretched, the Velcro is weak, or you keep tightening to stop leaks. If you use a chinstrap to keep your mouth closed, replace it every six months too, once the elastic loosens or dry mouth returns. Shop headgear and chinstraps.
Tubing
Your hose delivers pressurized air from the machine to the mask, and daily condensation makes it a place germs thrive. Replace standard or heated CPAP tubing every three months, or sooner if you see discoloration or cracks, feel stiffness, or notice a musty smell. Medicare allows one new tube every three months. Find the right fit in CPAP hoses and tubing.
Humidifier Water Chamber
The water chamber adds moisture so your nose and throat don't dry out. Replace it every 6 months. Tap water leaves a crusty mineral scale that's nearly impossible to remove and can harbor bacteria, so always use distilled water and watch for scale, cloudiness, or cracks. Shop humidifier chambers.
Your Complete Mask
Even with diligent parts swaps, replace the entire mask at least every 6 months. Like running shoes, the whole structure wears even when the laces are new: frames lose rigidity, and swivels develop micro-cracks, so the parts stop sealing together. Replace sooner if leaks persist with a new cushion or the headgear won't stay put. Medicare covers a complete new mask interface every 3 months, twice as often as the six-month minimum, so most insured CPAP users never need to stretch a mask past its prime. Browse CPAP masks.
Your CPAP Machine
CPAP machines last about 5 years, and insurance, including Medicare, typically follows that window when approving a replacement device. Replace sooner if the motor grows louder, pressure feels inconsistent, or the machine no longer holds settings. When the machine itself is due, browse our CPAP machines collection. If it's misbehaving rather than aging, start with ResMed AirSense 10 troubleshooting before buying new.
Medicare CPAP Supplies Replacement Schedule: What Insurance Covers
Yes, Medicare covers CPAP supply replacement. Medicare publishes exact allowable quantities for every CPAP supply, and most private insurers follow a similar calendar. If you have coverage, staying on schedule keeps your replacements within the covered quantities. What you actually pay depends on your deductible and coinsurance.
Medicare covers supplies on a use-it-or-lose-it calendar: quantities per month, per three months, or per six months, and the master table above lists each one with its source in CMS LCD L33718 [2]. Because the allowances match or beat the replacement guidelines, on-schedule replacement stays within what your plan covers.
How long will Medicare pay for CPAP supplies? As long as you stay on therapy and meet compliance requirements, replacement supplies stay covered on the published schedule. If you're paying cash or weighing your options, our guide to CPAP financing breaks down the cost side.
Signs You Waited Too Long
You don't always see failure. You feel it: leaks you keep chasing, straps you keep tightening, mornings that feel like the old days before therapy.
Watch for these warning signs: new or worsening leaks, tightening straps more than before, the mask slipping overnight, dry mouth returning, skin irritation or red marks, whistling or a musty smell, and an AHI or leak rate creeping up in your data.
A worn interface is a documented and fixable drag on both effectiveness and adherence [6]. Check your leak and AHI numbers in OSCAR to confirm what your gear is telling you.
Make Replacement Automatic
The schedule only works if you never have to remember it. Two Sleeplay tools do the remembering for you.
- Subscribe and Save puts your filters, cushions, and tubing on an automatic delivery calendar, so replacements arrive when they're due.
- The Part Finder identifies the exact compatible part for your mask and machine, so re-ordering takes a few clicks.
Cleaning Extends Life, But It Does Not Reset the Clock
A clean cushion still ages. Cleaning removes the oils and buildup that shorten a part's life, so components reach their full lifespan, but no amount of scrubbing takes them past it.
- Daily (2 minutes): wipe the cushion to remove skin oils, and empty the humidifier chamber, rinse it, and let it air dry.
- Weekly (10 minutes): wash the headgear, frame, tubing, and chamber in warm water with mild, non-abrasive soap, rinse well, and air dry out of direct sunlight.
For what's safe versus what damages silicone, our guide to the best soaps for CPAP equipment covers it in detail.
A few tools make the routine faster. CPAP cleaning wipes handle daily wipe-downs, the Liviliti Paptizer UVC LED sanitizer gives you a hands-off UV clean, the CSpring DeepClean Wand reaches the inside of the hose, and the portable RediClean-A travels with you. Everything else lives in our CPAP cleaning collection.
The Bottom Line
Two weeks for filters, one month for cushions, three months for tubing and frames, six months for headgear and chambers, five years for the machine.
Set it up once with Subscribe and Save, or find any part in the CPAP supplies collection, and you never have to track it again.
FAQs
How often should I replace my CPAP supplies?
The schedule varies by part. Generally, replace filters every two weeks, cushions and pillows monthly, tubing and frames every three months, and headgear, chin straps, and water chambers every six months. Most CPAP machines last about five years.
What are the signs I need new CPAP parts?
Look for air leaks you cannot fix, visible cracks or discoloration, stretched-out headgear, and any new discomfort, unusual noise, or skin irritation. All are signals a part is past its prime.
How often should I change my CPAP filter?
Change disposable filters every two weeks. Reusable foam filters should be washed weekly and replaced every six months. A clean filter traps dust and allergens while protecting your machine's motor.
When do CPAP cushions need to be replaced?
Every month. Daily contact with skin oils breaks down the silicone over time, compromising the seal and leading to leaks, discomfort, and reduced therapy effectiveness.
How long does a CPAP hose last before it needs replacing?
A CPAP hose should be replaced every 3 months. Over time the plastic develops tiny cracks that leak air, and moisture inside the tube can harbor bacteria. Heated tubing follows the same replacement schedule.
When should I change my CPAP humidifier water chamber?
Every six months. Even with regular cleaning and distilled water, microscopic scratches and mineral deposits can harbor bacteria over time.
How often should I replace my CPAP headgear or chin strap?
Both every six months. The elastic stretches with daily use, which forces you to overtighten the mask and can cause discomfort and pressure marks.
Does insurance cover CPAP supply replacement?
Yes. Medicare covers cushions monthly, nasal pillows twice a month, a complete mask every 3 months, tubing every 3 months, and headgear every 6 months. Most private insurers follow a similar schedule; check your plan for your specific replacement calendar.
How do I know which replacement part fits my machine?
Check your machine's model number and the mask documentation that came with your device. Most manufacturers list compatible replacement parts by model, and reputable CPAP retailers offer part-finder tools to help you identify the correct components.
References
- ResMed. "When to Replace CPAP Supplies." Official manufacturer replacement guidance. https://www.resmed.com/en-us/sleep-health/blog/when-to-replace-cpap-supplies/
- Centers for Medicare and Medicaid Services. "LCD L33718: Positive Airway Pressure Devices." Official allowable replacement quantities. https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33718
- Ortolano GA, et al. "Filters Reduce the Risk of Bacterial Transmission from Contaminated Heated Humidifiers Used with CPAP for OSA." Journal of Clinical Sleep Medicine, 2007. https://pubmed.ncbi.nlm.nih.gov/18198803/
- Choi JH, et al. "Level of Contamination of Positive Airway Pressure Devices Used in Obstructive Sleep Apnea." Clinical and Experimental Otorhinolaryngology, 2024. https://pubmed.ncbi.nlm.nih.gov/38499436/
- Rowland S, et al. "Comparing the Efficacy, Mask Leak, Adherence, and Preference of Three Different CPAP Interfaces." Journal of Clinical Sleep Medicine, 2018. https://pubmed.ncbi.nlm.nih.gov/29198305/
- Andrade RG, et al. "Impact of the Type of Mask on the Effectiveness of and Adherence to Continuous Positive Airway Pressure Treatment for Obstructive Sleep Apnea." Jornal Brasileiro de Pneumologia, 2014. https://pubmed.ncbi.nlm.nih.gov/25610507/
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