CPAP supply replacement schedule: what Medicare covers and when

The Medicare CPAP supply replacement schedule

Medicare (and most private plans that copy it) does not pay for CPAP supplies whenever you ask. It pays for a set quantity per period. If you order before the period is over, the claim is usually denied. This is the schedule most suppliers work from:

Part	Covered quantity	In practice
Nasal mask cushion or nasal pillows	2 per month	a new one every 2 weeks
Full-face mask cushion	1 per month	every 30 days
Mask frame (the whole mask)	1 per 3 months	every 90 days
Headgear	1 per 6 months	every 180 days
Chin strap	1 per 6 months	every 180 days
Disposable filters	2 per month	every 2 weeks
Non-disposable (reusable) filter	1 per 6 months	every 180 days
Tubing / hose (standard or heated)	1 per 3 months	every 90 days
Humidifier water chamber	1 per 6 months	every 180 days

The figures above are the ones published by the Sleep Foundation and used by large home-medical-equipment suppliers such as Lincare. Under Part B, Medicare pays 80% of the approved amount after the deductible, and you pay the remaining 20%. Supplemental or private plans may cover the rest, or use a different schedule entirely, so check your own plan's policy.

Is the schedule a rule or an allowance?

It is an allowance, not an instruction. Medicare will cover up to this many parts in this period; it does not say you must throw a cushion away on day 14. That distinction matters, because the manufacturers themselves often publish longer intervals. Fisher & Paykel, for example, suggests replacing a mask seal every 6 to 12 months and tubing every 12 months, and lists signs of wear to watch for rather than fixed dates.

In 2013 the HHS Office of Inspector General reviewed the schedule and noted that manufacturers recommended specific replacement frequencies for only a few supplies, and that sleep clinicians reported masks often need replacing less often than Medicare allows once the fit is right. The schedule was not changed, but the takeaway for patients is simple: the Medicare interval is the earliest you can get a part paid for, and a sensible default for when to check it.

Why replace parts on schedule at all

A CPAP works only if pressure reaches your airway without leaking, and every soft part degrades slowly enough that you do not notice from one night to the next:

• Cushions and pillows. Silicone absorbs skin oil, softens and loses its shape. The usual symptom is more leaking, a mask you keep tightening, or red marks on the bridge of the nose. Lincare points out that masks are guaranteed by the manufacturer for only 90 days.
• Headgear. Straps stretch and Velcro stops gripping, so you over-tighten to compensate.
• Filters. They clog with dust, pet hair and pollen. A clogged filter makes the motor work harder and lets less clean air through.
• Tubing. Small cracks and pinholes cause leaks; old tubing also gets harder to clean inside.
• Water chamber. Minerals and residue build up, the plastic pits, discolors or cracks.

Signs of wear always override the calendar. If a cushion tears in week one or the tubing splits, replace it; if your filter is grey after ten days in a dusty house, it is due.

How to use the schedule to reorder on time

The practical problem is not knowing the intervals, it is keeping eight different countdowns in your head. A few habits help:

1. Write down the date every time you put a fresh part on. The next covered date is counted from the last one you received, not from the first of the month.
2. Group parts that share an interval. Cushions and disposable filters are both two per month; mask frame and tubing are both every three months; headgear, reusable filter, chin strap and water chamber are every six months.
3. Order a few days early, not a few weeks early. Many suppliers ship automatically, but if you order yourself, a request that arrives before the eligible date may be rejected and you will have to reorder later.
4. Keep one spare of the fast-wearing parts. Because cushions and filters come in packs, a spare on the shelf saves you from sleeping with a worn cushion while the next order ships.
5. Check your plan once a year. Private plans and Medicare Advantage plans may use quarterly allowances or require a new prescription.

A simple replacement calendar

If you started everything fresh on the same day, your year would look roughly like this:

• Every 2 weeks: nasal cushion or pillows, disposable filter.
• Every month: full-face cushion.
• Every 3 months: mask frame, tubing.
• Every 6 months: headgear, chin strap, reusable filter, water chamber.

In reality parts drift apart quickly: a tube cracks early, a cushion arrives late, and after a few months nothing lines up. That is where a dated log, a spreadsheet or an app does better than memory.

Keeping track with Nightkit

Nightkit is a small iPhone app built for exactly this. You pick your mask type, and the replacement intervals are filled in from the Medicare schedule above. Each time you put on a new part you tap "Replaced today", and the home screen shows one number: how many days until the next part is due. Reminders arrive a few days before, on the day, and if you are late. Intervals can be changed to match what your provider or doctor recommends. Nightkit is a reminder tool, not medical advice; follow your sleep specialist and your equipment supplier.