Claim adjustment reason code
Denial code CO-239 meaning
CARC 239, usually seen as CO-239: The claim covers dates when the patient was eligible and dates when the patient was not.
Run it in Rivvi
Check the codes behind a denial
Upload a claims export. Rivvi flags ICD-10 and HCPCS codes that are not billable, replaced, or unspecified when a specific code exists.
Check my exportFree to start. Opens Rivvi, the AI workspace for healthcare teams.
- Reason code
- CARC 239
- Short name
- Claim spans covered and non-covered dates
- Plain meaning
- The claim covers dates when the patient was eligible and dates when the patient was not.
- Group codes
- CO-239: Contractual obligation. The provider absorbs the amount under its contract or the payer's rules. Do not bill the patient for it.
Plain-English summary written by Rivvi. X12 owns the CARC list and its exact wording, which is not reproduced here. Read it on the X12 CARC list (list dated November 1, 2025, checked October 23, 2026). This page does not decide how a claim is paid.
Common causes
- Coverage started or ended during the dates on the claim.
What to check before resubmitting
- Split the claim at the coverage dates and bill each to the right payer.
Related reason codes
Related pages
Questions
What does denial code CO-239 mean?
The claim covers dates when the patient was eligible and dates when the patient was not. This is Rivvi's plain-English summary of CARC 239. X12's exact wording is on x12.org.
How do I fix CO-239?
Split the claim at the coverage dates and bill each to the right payer.
Can I bill the patient for CO-239?
With group code CO, no. CO means the provider absorbs the amount under its contract or the payer's rules.
Which group codes come with CARC 239?
Most often CO (contractual obligation). The group code, not the reason code, says who owes the amount.
What is the difference between a CARC and a RARC?
A claim adjustment reason code (CARC) says why a claim line was paid differently than billed. A remittance advice remark code (RARC) adds detail, such as which field is missing.