CARC 223: Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code.
Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code.
CARC 223 appears on the 835 ERA (Electronic Remittance Advice) that the payer returns after claim adjudication. It explains a reduction, denial, or payment adjustment to your billing team. For your practice, the question is workflow: identify the pattern, route the denial to the right resolution path (rebill, appeal, write-off), and recover what's recoverable without burning RVU time on dead-end fights.
What CARC 223 means
The official X12 description is: “Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code.”
In plain language: Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code.
Practice workflow for CARC X 223
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
CARC 223 group codes explained
On the 835 ERA, CARC 223 appears alongside a group code that signals who is financially responsible for the adjustment. OA (Other Adjustment) — Informational or coordination-related adjustment. Usually means another payer is involved or there's a non-claim-related accounting entry.
Frequently asked questions
What does CARC 223 mean?
Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code. In plain language: Adjustment code for mandated federal, state, or local law/regulation that is not already covered by another code.
Is CARC 223 appealable?
CARC 223 is usually not appealable on its own — it's typically a contractual, informational, or routine adjustment. Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
Which group code does CARC 223 appear under?
CARC 223 most often appears under: OA (Other Adjustment) — Informational or coordination-related adjustment. Usually means another payer is involved or there's a non-claim-related accounting entry.
What should I do if I see CARC 223 on the 835?
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
Related resources
Sources
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