RARC N706: Claim Held for Missing Documentation
RARC N706 means "Missing documentation" — the payer processed your claim but cannot pay it as submitted because a required record was not attached. It usually rides with CO-16 (claim lacks information). The fix is to identify the specific document the payer wants and resubmit or send it as an attachment.
- Type
- Informational (supplemental)
- Usually paired with
- CO-16 (and CO-252 when the payer wants records)
- Fixable?
- Yes — always
- Typical fix
- Identify the missing record and resubmit with it attached
What does remark code N706 mean?
Official X12 text: "Missing documentation." The payer received your claim, ran it, and stopped short of payment because a record it needs to verify the service was not on file. The service may be perfectly coverable — the problem is that the payer cannot see the proof it requires until you send it.
ERA mini-example: 20610 (arthrocentesis, major joint) billed $145.00 pays $0.00 with CO-16 and N706. The payer's policy requires a procedure note documenting the joint aspirated and the medication injected, and none was attached. Send the note and the $145.00 line clears.
Which denial code does N706 come with?
Almost always CO-16 (claim/service lacks information needed for adjudication), because the claim is unprocessable rather than truly denied. When the payer is specifically demanding records to support the charge you may instead see CO-252 (an attachment is required). A companion remark such as M127 often names the exact record. Decode any pairing in the denial code lookup.
How do you fix an N706 denial?
- Read the full remit line: note every CARC and companion RARC, since N706 alone will not tell you which document is missing.
- Match the request to medical record documentation in the chart — operative note, order, test result, therapy plan, or proof of medical necessity.
- Confirm the record is complete: signatures, dates, and legible detail tying it to the billed CPT and date of service.
- Resubmit through the payer's attachment channel (electronic 275, portal upload, or corrected claim) and log the submission date against timely filing.
How do you prevent N706?
Build a pre-submission checklist keyed to the procedures most likely to trigger records requests, and let your EHR flag claims whose supporting note is unsigned or absent before the claim leaves the building. Track N706 by CPT and by provider: a cluster on one code usually means a payer policy started requiring an attachment that nobody loaded into the scrubber. Clean charge capture plus a documentation gate makes N706 rare.
Frequently asked questions
N706 itself only says "missing documentation" — it does not name the record. The specific item comes from the paired CARC, the payer policy, or a companion remark like M127 (patient medical record). Common requests are operative notes, physician orders, test results, therapy plans, or proof of medical necessity. Call the payer or read the policy to pin down exactly which document is required before you resubmit.
Functionally a denial for that line, but a recoverable one. The claim was accepted and adjudicated, then zeroed for lack of a record. Nothing about the coding or coverage is wrong. Once you supply the document the payer asked for, the line typically pays in full. Treat it as a documentation request with a filing clock, not a coverage dispute.
No. N706 almost always arrives under group code CO, a contractual obligation, so the amount is provider responsibility until the record is supplied. Missing documentation is a billing-side gap, not a patient benefit exclusion. Billing the patient for a CO-16/N706 line violates most payer contracts and, for Medicare, federal rules.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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