CARC 129 Active

PR-129: Prior Processing Information Incorrect

TL;DR

Patient responsibility — review the adjustment and determine if the patient truly owes this amount.

Action
Review & Decide
Who Pays
Patient
Appeal
No
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-129 Mean?

With PR (Patient Responsibility), the CARC 129 adjustment for prior processing information incorrect shifts the financial impact to the patient. Before billing the patient, verify that the denial reason is valid. if the underlying issue can be corrected, resubmit the claim first to potentially eliminate the patient's liability.

CARC 129 is used when the payer determines that prior processing information incorrect. The claim could not be processed as submitted because required information was absent, incomplete, or did not meet the payer's submission standards.

Common scenarios that trigger this adjustment include: the claim references a prior claim number or ICN that does not match the payer's records, preventing proper linkage to the original adjudication; The prior payment amount reported on the claim (such as for coordination of benefits) does not match the payer's records of the original adjudication; The adjustment codes from the prior payer's remittance were incorrectly transcribed onto the claim. The group code paired with CARC 129 determines who bears the financial responsibility — CO places it on the provider as a contractual obligation, OA indicates a coordination of benefits or other payer adjustment, PR shifts it to the patient.

How to Resolve

  1. Review the adjustment Examine the PR-129 adjustment and any RARC codes to understand the basis for the patient responsibility.
  2. Verify the adjustment is correct Confirm the PR designation and amount are appropriate based on the patient's plan benefits.
  3. Appeal if incorrect If the adjustment appears incorrect, file an appeal with supporting documentation.
  4. Collect from the patient if valid If the adjustment is confirmed correct, generate a patient statement and follow standard collection procedures.
Do Not Appeal This Code

This is a data error — the prior processing information does not match. Correct the prior claim reference, payment amounts, or adjustment codes and resubmit.

How to Prevent PR-129

Also Filed As

The same CARC 129 may appear with different Group Codes:

CO-129 OA-129

Related Denial Codes

PR-13 — Date of Death Precedes Date of Service PR-14 — Date of Birth Follows Date of Service PR-19 — Workers' Compensation Claim PR-20 — Liability Carrier Responsible PR-21 — No-Fault Carrier Responsible

Sources

  1. https://www.cms.gov/medicare/claims-appeals/organization-determinations
  2. https://www.aapc.com/resources/claim-adjustment-reason-code-carc
  3. https://www.mdclarity.com/denial-code/129
  4. Codes maintained by X12. Visit x12.org for official definitions.