Short answer: Medicare Part B covers Type I, II, III, and IV sleep tests and devices when a provider orders the test and the person has clinical signs and symptoms of sleep apnea.
Original Medicare coverage
Medicare covers qualifying sleep studies used to evaluate suspected sleep apnea. Type I testing is an attended study performed in a sleep laboratory. Other test types may be performed with portable equipment when the applicable requirements are met.
A sleep study is a diagnostic service. Coverage of the test does not guarantee coverage of every later treatment. CPAP therapy has its own coverage rules, including an initial trial and follow-up documentation.
Eligibility and limits
A doctor or other qualified provider must order the study. The record must support clinical signs and symptoms of sleep apnea. Medicare does not cover a sleep test used only for general screening when there are no relevant signs or symptoms. The type of test must be appropriate for the person’s condition, and the testing entity must satisfy Medicare requirements.
Type I tests are covered only when performed in a sleep laboratory facility. Coverage of a home sleep test depends on the test type, equipment, ordering provider, and applicable Medicare rules.
Costs
After the Part B deductible, the beneficiary generally pays 20 percent of the Medicare-approved amount. If the study is performed in a hospital outpatient department, a separate facility copayment may apply. Charges can differ between a sleep laboratory and a home test.
Medicare Advantage
Medicare Advantage plans cover qualifying sleep studies but may require prior authorization, a referral, and a network sleep laboratory or testing company. Cost sharing may differ.
What to do next
- Ask which type of sleep test is being ordered and why.
- Confirm that the facility or testing company participates in Medicare.
- Ask for separate estimates for professional and facility charges.
- For Medicare Advantage, obtain required authorization before the study.
Sources
Last reviewed: August 2026. Medicare rules and plan benefits can change.