CARC151ReferenceCurrentVerified Aug 15, 2026CARC 151
AR Guide Workflow
Medical Necessity
The payer determined the service was not medically necessary or reasonable according to its policy. These denials are documentation-driven.
AR Guide explanation
What it means
The payer deems the information does not support the number/frequency of services.
AR Guide knowledge
Common denial category
Medical Necessity — The payer determined the service was not medically necessary or reasonable according to its policy. These denials are documentation-driven.
AR Guide knowledge
Common causes
- Frequency limits exceeded
- Services not medically reasonable for the frequency billed
AR Guide knowledge
What AR should verify
- Check frequency limits for the service
- Confirm the medical need for the number of services
AR Guide knowledge
Recommended action
- Appeal with documentation of medical need
- If frequency was exceeded, adjust to the supported frequency
About this guidance: Note
AR Guide knowledge is general reference content written by our team — it is not payer-specific policy and never replaces the payer’s documentation or your contract. Always confirm specifics with the payer.