Claim adjustment reason code
Denial code CO-14 meaning
CARC 14, usually seen as CO-14: The date of birth on file is after the date of service, which is not possible.
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- Reason code
- CARC 14
- Short name
- Date of birth after date of service
- Plain meaning
- The date of birth on file is after the date of service, which is not possible.
- Group codes
- CO-14: 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
- A newborn was billed under the wrong date of birth or under a parent's ID.
- The date of service or date of birth was keyed wrong.
What to check before resubmitting
- Check both dates against the record and the ID card.
- Resubmit with the correct dates.
Related reason codes
Related pages
Questions
What does denial code CO-14 mean?
The date of birth on file is after the date of service, which is not possible. This is Rivvi's plain-English summary of CARC 14. X12's exact wording is on x12.org.
How do I fix CO-14?
Check both dates against the record and the ID card. Resubmit with the correct dates.
Can I bill the patient for CO-14?
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 14?
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.