CPAP and home oxygen: the specific test numbers a claim denial turns on

Request a copy of the actual sleep-test or blood-gas report if you don't already have it — the specific AHI/RDI number, or the specific oxygen saturation/pressure reading, is the single fact a claim denial like this turns on.

For CPAP in the 5-14 AHI/RDI range, the qualifying symptoms need to be specifically documented by the physician — a test result in that range without documented symptoms doesn't meet the standard on its own.

CPAP coverage past the initial trial period requires documented adherence — regular nightly use meeting a specific usage threshold — plus a face-to-face re-evaluation by the treating practitioner confirming the therapy is actually helping.ruleNCD 240.4

A denial for continued CPAP use often turns on missing adherence data from the equipment's own usage log, not on the original diagnosis being wrong — ask the supplier for a copy of the compliance download if a continuation claim was denied.

Home oxygen coverage similarly depends on ongoing physician documentation, not just the initial qualifying test — a claim denial for continued oxygen use is worth checking against whether the most recent visit notes actually support medical need, separate from the original qualifying blood-gas result.

Medicare generally pays for CPAP and home oxygen equipment as a monthly rental rather than an outright purchase for a set period, with ownership eventually transferring after continued medical need is documented — a gap in billed months isn't automatically evidence the equipment wasn't needed, but it is something a reviewer may ask about.

If a family stopped using the equipment for a documented medical reason — hospitalization, a supply or mask-fit problem, or a temporary change in treatment — putting that reason in writing as part of the redetermination request directly addresses the most likely reason a continuation claim like this gets denied.