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N736 Remark Code: Incomplete Sleep Study Report

N736 means the payer received a sleep study report but found it incomplete or invalid. It often affects claims for PAP devices and other sleep apnea treatment, where the study results establish whether coverage criteria are met.

Quick facts

Code
N736 (RARC N736)
Status
Active In use since March 1, 2015.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The provider or supplier bears the adjustment while the sleep study report is deficient. Do not bill the patient.
Official description
Incomplete/invalid Sleep Study Report.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N736 means

Sleep apnea treatment coverage usually depends on objective test results. The sleep study report is where those results live: the type of test, how long it ran, the breathing event indices, oxygen findings, and the interpreting physician’s conclusions. N736 says the report you sent did not meet the payer’s standard.

DME suppliers see this remark most often on claims for PAP devices, but sleep labs and physicians can receive it too. It usually pairs with CARC 251 or CARC 272.

Common causes

  • The interpreting physician’s signature or credentials are missing.
  • The report shows raw data but no interpretation or diagnosis.
  • Required values, such as the event index the payer’s criteria rely on, are not stated.
  • The study was performed with a test type or duration the payer does not accept.
  • The report is from a different test date than the one referenced on the order.

How to fix it

  1. Compare the report against the payer’s sleep apnea coverage policy to find the missing element.
  2. Request the final, signed interpretation from the sleep lab or interpreting physician.
  3. If the study itself does not meet the payer’s criteria, a new qualifying study may be needed before the item can be covered.
  4. Resubmit the complete report through the payer’s reconsideration or records channel, referencing the claim.

How to prevent it

Suppliers can review the sleep study report at intake, before dispensing, against a short checklist drawn from the payer’s policy. Sleep labs can build the payer-required fields into their report template so every final report includes them.

Codes that may appear with N736

  • CO-251 (The attachment/other documentation that was received was incomplete or deficient.): The documentation received was incomplete or deficient.
  • CO-272 (Coverage/program guidelines were not met.): Coverage criteria, which depend on the sleep study results, were not shown to be met.
  • CO-16 (Claim/service lacks information or has submission/billing error(s).): A general missing or invalid information denial.
  • N737 (Missing Sleep Study Report.): No sleep study report was received.
  • N458 (Incomplete/invalid Diagnostic Report.): An incomplete diagnostic report in general, not specific to sleep testing.
  • N713 (Incomplete/invalid report.): An incomplete report of an unspecified type.

N736 FAQ

Which claims need a sleep study report?

Payers commonly require one for positive airway pressure devices and supplies, oral appliances for sleep apnea, and sometimes the sleep testing itself. Requirements differ by payer.

What makes a sleep study report invalid?

Frequent problems include no interpreting physician signature, missing key results, a test type the payer does not accept for the item, or a study date outside the payer's allowed window.

Can a home sleep test report be used?

Many payers accept home sleep apnea testing for certain patients, while others require an in-lab study in some situations. Check the policy that applies to the patient.