CARC 56 Active

PR-56: Procedure/Treatment Not Proven Effective

TL;DR

Patient responsibility — review the denial and appeal if the patient should not be liable. Do not bill the patient until the appeal is resolved.

Action
Appeal
Who Pays
Patient
Appeal
Yes
Patient Impact
Direct Financial
Disclaimer
This content is for informational purposes only and does not constitute professional billing advice. Always verify information against your payer contracts and current coding guidelines. Consult a certified billing specialist for specific claim issues.

What Does PR-56 Mean?

With PR (Patient Responsibility), the CARC 56 adjustment for procedure/treatment not proven effective shifts the financial impact to the patient. Before billing the patient, verify that the denial reason is valid. The most common cause is patient elected to receive treatment not deemed effective by payer — if the underlying issue can be corrected, resubmit the claim first to potentially eliminate the patient's liability.

CARC 56 indicates procedure/treatment not proven effective. The payer determined that the service or a portion of it does not meet coverage criteria under the patient's current plan benefits or the applicable coverage rules.

Common scenarios that trigger this adjustment include: the payer's medical review determined the treatment has not been proven effective for the patient's condition; Available clinical studies do not demonstrate effectiveness to the payer's standards; Payer requires use of proven alternatives before covering this treatment. The group code paired with CARC 56 determines who bears the financial responsibility — CO places it on the provider as a contractual obligation, PR shifts it to the patient, OA indicates a coordination of benefits or other payer adjustment.

Common Causes

Cause Frequency
Patient chose unproven treatment Patient elected to receive treatment not deemed effective by payer Most Common

How to Resolve

  1. Review the denial Examine the PR-56 denial and any RARC codes to understand why the patient was held responsible.
  2. Gather supporting documentation Collect medical records, authorization documents, or plan benefit details that support coverage.
  3. File an appeal Appeal on patient's behalf with clinical evidence. Bill patient if appeal is denied.
  4. Hold patient billing pending appeal Do not bill the patient until the appeal is resolved. If the appeal is denied, then generate a patient statement.
Appeal Guide

Appeal on patient's behalf with clinical evidence. Bill patient if appeal is denied.

Common RARC Pairings

The RARC code tells you exactly what triggered the PR-56:

RARC Description
N381 Consult contract/fee schedule Review terms before billing patient →

How to Prevent PR-56

Also Filed As

The same CARC 56 may appear with different Group Codes:

CO-56 OA-56

Related Denial Codes

PR-26 — Expenses Incurred Prior to Coverage PR-35 — Lifetime Benefit Maximum Reached PR-40 — Charges Do Not Meet Emergent/Urgent Care Qualifications PR-49 — Non-Covered Routine/Preventive Exam PR-51 — Non-Covered Pre-existing Condition

Sources

  1. https://x12.org/codes/claim-adjustment-reason-codes
  2. https://revenuecyclemgmt.com/claim-adjustment-reason-codes/
  3. https://www.rivethealth.com/blog/carcs-rarcs-claim-adjustment-remittance-advice-codes
  4. Codes maintained by X12. Visit x12.org for official definitions.