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 is the code your insurance company used to explain why your claim was reduced, denied, or paid less than expected. It appears on your Explanation of Benefits (EOB) — the statement your plan sends after a claim is processed. Here's what it means for you and what you can do about it.
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.
What to do next 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.
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