#1145 2008 · Centers for Medicare & Medicaid Services (CMS) · Durable medical equipment / healthcare reimbursement
Medicare stopped paying for CPAP machines and paid only for machines actually used
the problem
Medicare was renting CPAP machines to patients who stopped using them within weeks, paying regardless of use
background
CPAP machines treat obstructive sleep apnea effectively, but they are uncomfortable to wear and a large share of prescribed patients stop using theirs within the first few months — historically estimated around half of all patients. Medicare covered CPAP as a durable-medical-equipment rental, paying the supplier a monthly fee for up to 13 months regardless of whether the patient actually used the machine that month, which meant Medicare was often paying in full for equipment gathering dust on a nightstand.
There was no practical way for Medicare to check usage at scale — a supplier or physician's word that a patient was 'using' the device was the only evidence available, and neither had a strong incentive to verify it closely.
what everyone would do
Cover the standard 13-month rental unconditionally the way most durable medical equipment was reimbursed, and rely on the prescribing physician's periodic checkups to catch non-adherent patients.
what they saw
Medicare stopped asking whether the machine was delivered and started asking whether it was used, letting the device's own modem answer instead of trusting the supplier's word for it.
the move
CMS's national coverage policy, effective 2008, made continued rental payment conditional on documented proof of adherence: the patient must use the device at least 4 hours a night on at least 70% of nights in a 30-day window within the first 90 days of therapy, verified through the data the CPAP machine's own cellular or wireless modem automatically transmits. Fail the threshold, and Medicare stops paying the monthly rental and the supplier can reclaim the machine — the payment is now gated on the machine proving it was actually delivering therapy, not just occupying a bedroom.
why it works
By making the DME supplier's own revenue depend on the patient's usage data, the policy converts the supplier from a passive equipment-dropper into an active party with a financial stake in the patient's adherence — suppliers now call patients, troubleshoot mask fit and coach compliance because a non-adherent patient directly costs them the ongoing rental income, not just Medicare's money. The mechanism works because the device can report its own use automatically, removing the need for anyone to trust a self-reported or physician-observed account.
the payoff
Suppliers now proactively coach patients toward compliance, since an unused machine costs them an unpaid rental, not just wasted equipment.
where it breaks
It only works where the equipment itself can reliably meter genuine use rather than a proxy for it, and where the burden of achieving compliance can actually be influenced by the party being paid — patients whose non-adherence stems from causes a supplier cannot address (severe claustrophobia, unrelated illness) are simply cut off from coverage rather than helped, and the strict 90-day window has been criticized for denying long-term benefit to patients who adhere more slowly.
what came after
Telemetry-verified compliance billing for CPAP became a template other durable-medical-equipment categories have since adopted, tying continued reimbursement to proof of actual use rather than proof of delivery.
references
- [1]Does Medicare Cover CPAP Machines?SleepApnea.org (American Sleep Apnea Association), 2024sleepapnea.org
- [2]Targeting ComplianceHomeCare Magazine, 2010homecaremag.com