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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.
Note: this video gives three months for headgear and three to six months for the water chamber. ResMed's guidance lists six months for both [1], which is what this schedule follows. For cleaning steps, follow your machine's user guide.
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 replacement 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 pairs per month | Nostril irritation, loose fit |
| Mask frame | Every 3 months | No separate allowance (a new frame comes with a new mask, 1 per 3 months) | 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 | Replacement after the 5-year reasonable useful lifetime, with a new in-person visit | Rising noise, inconsistent pressure |
The guideline column follows ResMed's replacement guidance [1] except four rows: ResMed lists filters monthly, and two weeks is our respiratory therapist's advice (How Often Should You Change Your CPAP Filter?). The reusable filter row follows the Philips DreamStation 2 user manual, the machine row the 5-year design life in the ResMed AirSense 11 user guide, and the complete mask row is our recommendation, since no manufacturer we checked sets one interval (the Fisher & Paykel Evora Full guide sets a 12-month limit). The Medicare column lists the usual maximum quantities in 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. The mask itself also matters: in a randomized study of three mask setups, oronasal masks left a higher residual AHI and drew more leak and fit complaints than nasal masks [5], and a review found that the type of interface affects both effectiveness and adherence [6].
Bacteria are the second reason. In a lab study, bacteria from contaminated humidifier water reached the tubing, and an in-line filter (not your machine's air filter) blocked them [3]. A 2024 study of 55 patients' disassembled CPAP devices found substantial contamination on masks, tubing, humidifiers, and machine interiors [4]. That's why a clean chamber 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."
Aliria Perez, CRT, Sleeplay, in our video Lesson 20: Replacement Parts and Guidelines
Note: this video gives 5 to 7 years for the machine. The ResMed AirSense 11 user guide lists a 5-year design life, and Medicare's reasonable useful lifetime is 5 years [2], which is the figure this guide uses.
"You're wearing CPAP, but the therapy is leaking away."
Aliria Perez, CRT, Sleeplay, in the video above
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. Change disposable filters every two weeks, or sooner if they look gray or dusty. 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 collects facial oils and wears with daily use, 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 mineral scale that can harbor bacteria, so use distilled water (the AirSense 11 standard water tub calls for distilled water only) 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's usual maximum is one complete new mask every 3 months, more often than our six-month recommendation. 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 usual maximum quantities for each CPAP supply, and private plans set their own schedules, so check yours. 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 up to a usual maximum: quantities per month, per three months, or per six months, and the master table above lists each one from CMS LCD L33718 [2]. Your supplier must confirm with you that you still need a refill before sending it. Because these maximums match or exceed the guidelines in the table, on-schedule replacement stays within them.
How long will Medicare pay for CPAP supplies? As long as you stay on therapy and your supplier documents that the supplies remain medically necessary, replacements stay eligible up to those maximums. 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 mask that no longer seals can let leaks undercut your therapy. 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: wash the cushion or pillows and the frame in warm water with a mild liquid detergent, rinse, and air dry out of direct sunlight; empty the humidifier chamber, wipe it out, and let it dry.
- Weekly: wash the headgear, tubing, and chamber in warm water with a mild liquid detergent, rinse well, and air dry out of direct sunlight.
Note: this video suggests soaking tubing and the mask in a vinegar solution and mentions ozone and UV cleaners. The ResMed AirSense 11 user guide allows a 1 part vinegar to 9 parts water solution only for the water tub and outlet connector, and the FDA says UV light and ozone can break down CPAP hoses and masks, so follow your mask and machine user guides.
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 360 adds an FDA-cleared UV-C step after washing (cleared for the ResMed AirFit F20 cushion only), the CSpring DeepClean Wand scrubs the corners of the water chamber, and the countertop CSpring RediClean washes and dries them for 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, or sooner if it leaks or turns cracked, cloudy, or pitted. Mineral deposits and wear build up even with regular cleaning, so use distilled water if your chamber calls for it.
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's usual maximums are one full face cushion a month, two nasal cushions or two pairs of nasal pillows a month, one complete mask every 3 months, one tube every 3 months, and one headgear every 6 months. Private plans set their own schedules, so check yours.
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 (PAP) Devices for the Treatment of Obstructive Sleep Apnea." Usual maximum 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, Patient Adherence, and Patient Preference of Three Different CPAP Interfaces to Treat Moderate-Severe Obstructive Sleep Apnea." 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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