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CO-214 Denial Code (Deactivated): WC Non-Compensable

CO-214 meant the workers' compensation carrier adjudicated the claim as non-compensable and was not liable for the claim or treatment. X12 deactivated it and its notes direct payers to code P4.

X12 deactivated CARC214 on July 1, 2014. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals.

Code: CO-214 (CARC 214)
Status: Deactivated StoppedJuly 1, 2014 (in use since January 27, 2008).
Code set: Claim Adjustment Reason Codes (CARC)
Group codes: CO (Contractual Obligation): The workers' compensation carrier would not pay; the provider needed to look to other coverage.
Official description: Workers' Compensation claim adjudicated as non-compensable. This Payer not liable for claim or service/treatment. Note: If adjustment is at the Claim Level, the payer must send and the provider should refer to the 835 Insurance Policy Number Segment (Loop 2100 Other Claim Related Information REF qualifier 'IG') for the jurisdictional regulation. If adjustment is at the Line Level, the payer must send and the provider should refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment information REF). To be used for Workers' Compensation only
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What CO-214 meant

CARC 214 was limited to workers’ compensation. It said the carrier had decided the claim was non-compensable, meaning the case as a whole was not accepted, so neither the claim nor the treatment would be paid. The code text also directed providers to the 835 fields where the jurisdictional regulation behind the decision should appear.

What replaced it

The note on this code is “Use code P4.” CO-P4 carries the same meaning within the P-series used for property and casualty, including workers’ compensation. If the carrier’s specific reason is that the injury was not job-related, it may use CO-P2 instead. A provider-enrollment problem in the workers’ compensation system has its own code, CO-P16.

If you still see CO-214

Older workers’ compensation remittances may still show it. Get the carrier’s written determination and check whether the patient or employer is contesting it. While that plays out, many practices bill the patient’s health plan with the denial attached so filing deadlines are not missed, then adjust if the compensability decision is reversed.

CO-P4 (Workers' Compensation claim adjudicated as non-compensable.): Named replacement: workers' compensation claim adjudicated as non-compensable.
CO-P2 (Not a work related injury/illness and thus not the liability of the workers' compensation carrier): Not a work-related injury or illness, a narrower reason for the carrier to decline.
CO-P16 (Medical provider not authorized/certified to provide treatment to injured workers in this jurisdiction.): Provider not authorized or certified to treat injured workers in the jurisdiction.

CO-214 FAQ

Is non-compensable the same as not work-related?

Not always. A claim can be non-compensable for reasons such as a late report, a disputed claim, or an exclusion under state law, even when the injury happened at work. Not-work-related is one specific reason and has its own code.

Who pays after a non-compensable finding?

Often the patient's health plan, which usually wants the workers' compensation denial on file. If the patient is disputing the finding, the outcome of that dispute may change the liable payer.

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