Claim adjustment reason code
Denial code CO-250 meaning
CARC 250, usually seen as CO-250: The attachment received was not the one the payer needed.
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- Reason code
- CARC 250
- Short name
- Wrong attachment received
- Plain meaning
- The attachment received was not the one the payer needed.
- Group codes
- CO-250: 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
- The wrong record was sent for the claim.
What to check before resubmitting
- Send the record the payer asked for.
Related reason codes
Related pages
Questions
What does denial code CO-250 mean?
The attachment received was not the one the payer needed. This is Rivvi's plain-English summary of CARC 250. X12's exact wording is on x12.org.
How do I fix CO-250?
Send the record the payer asked for.
Can I bill the patient for CO-250?
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 250?
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.