Claim adjustment reason code
Denial code CO-150 meaning
CARC 150, usually seen as CO-150: The payer decided the information sent does not support the level of service billed.
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- Reason code
- CARC 150
- Short name
- Level of service not supported
- Plain meaning
- The payer decided the information sent does not support the level of service billed.
- Group codes
- CO-150: 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 E/M level billed is higher than the documentation supports.
What to check before resubmitting
- Review the documentation against the E/M level rules.
- Appeal with the record, or rebill the supported level.
Remark codes that often come with it
Related reason codes
Related pages
Questions
What does denial code CO-150 mean?
The payer decided the information sent does not support the level of service billed. This is Rivvi's plain-English summary of CARC 150. X12's exact wording is on x12.org.
How do I fix CO-150?
Review the documentation against the E/M level rules. Appeal with the record, or rebill the supported level.
Can I bill the patient for CO-150?
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 150?
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.