CARC 301 Active

OA-301: Medical Plan Claim — Submit to Behavioral Health Plan

TL;DR

COB processing identified the behavioral health plan as the responsible payer. Verify COB details and resubmit to the correct plan.

Action
Verify & Resubmit
Who Pays
Depends
Appeal
Yes
Patient Impact
Indirect
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 OA-301 Mean?

The OA group code signals that the adjustment arose during coordination of benefits processing. A secondary payer or COB review identified the behavioral health plan as the responsible payer, and the medical plan redirected the claim accordingly.

CARC 301 appears on a remittance when the medical plan determines that the billed service falls under behavioral health coverage rather than the medical benefit. Many insurers use a carve-out arrangement that separates behavioral health from the medical plan, and when the medical plan identifies a claim as behavioral health, it denies the claim and directs the provider to submit it to the appropriate behavioral health plan.

This code is most common when providers submit mental health or substance abuse services to a medical plan that does not administer those benefits. It can also appear when diagnosis or procedure codes on the claim trigger the medical plan's behavioral health classification logic, even if the provider views the service as primarily medical.

Common Causes

Cause Frequency
Service classified as behavioral health Medical plan determined the service falls under behavioral health coverage during COB processing Most Common
Behavioral health carve-out Patient's plan uses a behavioral health carve-out and the medical plan cannot process the claim Most Common
Coordination of benefits mismatch COB processing identified that the behavioral health plan, not the medical plan, is responsible for the service Common

How to Resolve

  1. Review coordination of benefits details to identify the correct behavioral health plan
  2. Contact the medical plan to confirm the behavioral health plan information
  3. Resubmit the claim to the behavioral health plan with COB information attached
  4. If the service is medical in nature, appeal with supporting clinical documentation and COB records
Appeal Guide

Appeal with documentation showing the service is medical in nature and should be covered under the medical plan rather than the behavioral health plan. Include COB documentation and clinical records.

Common RARC Pairings

The RARC code tells you exactly what triggered the OA-301:

RARC Description
N527 Payment has been issued to another plan/entity for this claim. Verify COB details and resubmit to the behavioral health plan →

How to Prevent OA-301

Also Filed As

The same CARC 301 may appear with different Group Codes:

CO-301 PR-301

Related Denial Codes

OA-304 — Medical Plan Claim — Submit to Hearing Plan OA-305 — Medical Plan Claim — Forwarded to Hearing Plan OA-B11 — Claim Transferred to Proper Payer — Not Covered Here OA-19 — Workers' Compensation Claim OA-20 — Liability Carrier Responsible

Sources

  1. https://x12.org/codes/claim-adjustment-reason-codes
  2. https://www.mdclarity.com/denial-code/301
  3. https://www.cms.gov/medicare/payment/prospective-payment-systems
  4. Codes maintained by X12. Visit x12.org for official definitions.