CARC 203: Discontinued or reduced service.
Discontinued or reduced service.
CARC 203 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 203 means
The official X12 description is: “Discontinued or reduced service.”
In plain language: Discontinued or reduced service.
What to do next 203
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
CARC 203 group codes explained
On the 835 ERA, CARC 203 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 203 mean?
Discontinued or reduced service. In plain language: Discontinued or reduced service.
Is CARC 203 appealable?
CARC 203 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 203 appear under?
CARC 203 most often appears under: CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
What should I do if I see CARC 203 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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