CARC 151: Payment adjusted because the payer deems the information submitted does not support this many/frequency of services.
The carrier thinks the volume or frequency exceeds what's medically supported. Common on PT, infusions, lab repeats.
CARC 151 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 151 means
The official X12 description is: “Payment adjusted because the payer deems the information submitted does not support this many/frequency of services.”
In plain language: The carrier thinks the volume or frequency exceeds what's medically supported. Common on PT, infusions, lab repeats.
Common scenarios
- Frequent PT visits
- Repeat lab work
- Quantity over plan's tier limit
What to do next 151
Appeal with documentation of clinical need for the frequency (e.g., severity, progress notes, treatment plan). Plans often have soft frequency limits that flex with clinical evidence.
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 151 group codes explained
On the 835 ERA, CARC 151 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 151 mean?
Payment adjusted because the payer deems the information submitted does not support this many/frequency of services. In plain language: The carrier thinks the volume or frequency exceeds what's medically supported. Common on PT, infusions, lab repeats.
Is CARC 151 appealable?
Yes — CARC 151 is one of the codes that commonly supports an appeal. Appeal with documentation of clinical need for the frequency (e.g., severity, progress notes, treatment plan). Plans often have soft frequency limits that flex with clinical evidence.
Which group code does CARC 151 appear under?
CARC 151 most often appears under: CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.
When does CARC 151 typically appear on a denial?
Common scenarios: Frequent PT visits; Repeat lab work; Quantity over plan's tier limit.
How do I appeal a CARC 151 denial?
Appeal with documentation of clinical need for the frequency (e.g., severity, progress notes, treatment plan). Plans often have soft frequency limits that flex with clinical evidence.
Related resources
Sources
Appeal a CARC 151 denial
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