CPAP tools
CPAP Compliance Calculator
Medicare and many private insurers continue paying for a CPAP machine after the first months only if you show adherence: using it at least 4 hours a night on at least 70 percent of nights in a consecutive 30 day period during the first 3 months. Enter the number of nights with 4 or more hours of use from your machine or app to check.
How it works
Percent = nights with at least 4 hours / days in the period x 100. The Medicare rule needs at least 70 percent, which for a 30 day period is 21 nights.
Example
19 qualifying nights in 30 days = 63.3 percent. 21 are needed, so 2 more qualifying nights would have been needed in that window.
Assumptions and limits
- Based on the Medicare Local Coverage Determination for PAP devices (L33718). Private insurers often use similar rules, but check your plan.
- The 30 day window must be consecutive and fall within the first 3 months of use. Medicare also requires a face to face visit with the treating practitioner between day 31 and day 91 to document benefit.
- Using CPAP for the whole night, every night, is better for health than meeting the minimum.
Frequently asked questions
What happens if I miss the 70 percent rule?
For Medicare, coverage beyond the trial can be denied. The policy allows a re-evaluation and a new trial, which may require a repeat in-facility sleep test. Talk to your supplier and clinician early if you are struggling.
Do short naps with CPAP count?
Only nights with at least 4 hours of use count toward the 70 percent. Supplier guidance describes the 4 hours as essentially continuous use, with short breaks such as bathroom trips allowed.
How can I make CPAP easier to use?
Common fixes include a better fitting or different style mask, heated humidification for dryness, using the ramp feature, and practicing wearing the mask while awake. Your sleep team can also review leak and pressure data.
How do I see my usage?
Most modern CPAP machines record hours of use each night and show them on the device or in the manufacturer's app, and suppliers often receive the data wirelessly.
Sources
Tools and screening scores are general information. They cannot diagnose or rule out a sleep disorder. Read our medical disclaimer.