CARC 233: Services/charges related to the treatment of a hospital-acquired condition or preventable medical error.
Services/charges related to the treatment of a hospital-acquired condition or preventable medical error.
CARC 233 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 233 means
The official X12 description is: “Services/charges related to the treatment of a hospital-acquired condition or preventable medical error.”
In plain language: Services/charges related to the treatment of a hospital-acquired condition or preventable medical error.
What to do next 233
Appeal with documentation specific to this code. The provider's billing office can help clarify what the carrier wants.
DenialHelp helps organize a source-linked draft from the denial notice and confirmed case facts. The patient and treating clinician must verify the governing review rule, current payer policy, clinical sources, attachments, destination, and deadline.
CARC 233 group codes explained
On the 835 ERA, CARC 233 appears alongside a group code that signals who is financially responsible for the adjustment. CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
Frequently asked questions
What does CARC 233 mean?
Services/charges related to the treatment of a hospital-acquired condition or preventable medical error. In plain language: Services/charges related to the treatment of a hospital-acquired condition or preventable medical error.
Is CARC 233 appealable?
Yes — CARC 233 is one of the codes that commonly supports an appeal. Appeal with documentation specific to this code. The provider's billing office can help clarify what the carrier wants.
Which group code does CARC 233 appear under?
CARC 233 most often appears under: CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
How do I appeal a CARC 233 denial?
Appeal with documentation specific to this code. The provider's billing office can help clarify what the carrier wants.
Related resources
Sources
Appeal a CARC 233 denial
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