Claim adjustment reason code
Denial code CO-135 meaning
CARC 135, usually seen as CO-135: The payer does not process interim bills for this type of claim.
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- Reason code
- CARC 135
- Short name
- Interim bills cannot be processed
- Plain meaning
- The payer does not process interim bills for this type of claim.
- Group codes
- CO-135: 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
- An interim bill type was sent when the payer needs the final bill.
What to check before resubmitting
- Send the final bill when the stay ends.
Related pages
Questions
What does denial code CO-135 mean?
The payer does not process interim bills for this type of claim. This is Rivvi's plain-English summary of CARC 135. X12's exact wording is on x12.org.
How do I fix CO-135?
Send the final bill when the stay ends.
Can I bill the patient for CO-135?
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 135?
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.