CARC 135: Interim bills cannot be processed.
Interim bills cannot be processed.
CARC 135 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 135 means
The official X12 description is: “Interim bills cannot be processed.”
In plain language: Interim bills cannot be processed.
Practice workflow for CARC X 135
Verify the EOB details. If you believe the code is misapplied, contact the carrier's member services or your provider's billing office.
CARC 135 group codes explained
On the 835 ERA, CARC 135 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 135 mean?
Interim bills cannot be processed. In plain language: Interim bills cannot be processed.
Is CARC 135 appealable?
CARC 135 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 135 appear under?
CARC 135 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 135 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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