CARC P1 Active

CO-P1: State-Mandated Requirement — Property and Casualty Only

TL;DR

CO-P1 is a state-mandated P&C adjustment. Verify the regulation and dispute if incorrectly applied.

Action
Review & Decide
Who Pays
Provider
Appeal
Yes
Patient Impact
None
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 CO-P1 Mean?

When paired with Group Code CO, the state-mandated adjustment is contractual for P&C claims. The provider absorbs the adjustment per the applicable state regulation. Cannot be transferred to the patient.

CARC P1 applies exclusively to property and casualty (P&C) claims, including auto insurance and workers' compensation. It indicates the payment was adjusted based on a state-mandated requirement — such as a state fee schedule, mandated treatment guidelines, regulatory reporting obligations, or specific billing format requirements.

P&C claims are heavily regulated at the state level, with each jurisdiction maintaining its own set of rules for fee schedules, treatment protocols, and billing requirements. CARC P1 is the catch-all code for adjustments triggered by these state-specific mandates.

The specific state mandate affecting the claim should be identifiable from the accompanying RARC codes or by contacting the P&C adjuster. Understanding the applicable state regulation is essential for determining whether to accept the adjustment or dispute it.

Common Causes

Cause Frequency
State fee schedule reduction The state's workers' compensation or P&C fee schedule mandates a lower allowed amount than the billed charges Most Common
State-mandated treatment guidelines not followed The treatment provided does not comply with the state's mandated treatment guidelines for P&C claims Common
State regulatory requirement not met A state-specific regulatory requirement (documentation, reporting, authorization) was not satisfied Common
State-mandated billing format violation The claim does not comply with the state's mandated billing format or submission requirements for P&C claims Occasional

How to Resolve

  1. Identify the state mandate Determine which state regulation triggered the adjustment.
  2. Verify compliance Confirm your claim meets the state requirements.
  3. Dispute if incorrect Appeal with regulatory citations and compliance documentation.
  4. Accept if correct If the mandate applies, accept the adjustment.
Appeal Guide

Appeal with documentation showing compliance with the specific state mandate referenced in the remark code. Include the applicable state regulation citation, fee schedule documentation, and evidence of compliance with treatment guidelines.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-P1:

RARC Description
N381 Alert: Consult your contractual agreement for restrictions, billing, and payment information. Review the state P&C regulations and your agreement with the payer for the specific state-mandated requirement →

How to Prevent CO-P1

Also Filed As

The same CARC P1 may appear with different Group Codes:

OA-P1 PR-P1

Related Denial Codes

CO-101 — Predetermination: Anticipated Payment CO-106 — Patient Payment Option Not in Effect CO-109 — Claim Not Covered by This Payer CO-115 — Procedure Postponed, Canceled, or Delayed CO-132 — Prearranged Demonstration Project Adjustment

Sources

  1. https://x12.org/codes/claim-adjustment-reason-codes
  2. https://www.mdclarity.com/denial-code/p1
  3. Codes maintained by X12. Visit x12.org for official definitions.