CARC 237: Legislated/Regulatory Penalty.
Legislated/Regulatory Penalty.
CARC 237 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 237 means
The official X12 description is: “Legislated/Regulatory Penalty.”
In plain language: Legislated/Regulatory Penalty.
What to do next 237
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
CARC 237 group codes explained
On the 835 ERA, CARC 237 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 237 mean?
Legislated/Regulatory Penalty. In plain language: Legislated/Regulatory Penalty.
Is CARC 237 appealable?
CARC 237 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 237 appear under?
CARC 237 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 237 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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