CARC 201 Active

OA-201: Patient Responsibility via Set-Aside Arrangement

TL;DR

The set-aside arrangement was flagged during coordination of benefits. Determine which expenses fall within the set-aside scope.

Action
Review & Decide
Who Pays
Depends
Appeal
No
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-201 Mean?

With OA (Other Adjustments), the set-aside arrangement was flagged during coordination of benefits. Review the arrangement to determine which services are covered by the set-aside versus the insurance plan.

CARC 201 indicates that the patient has a formal set-aside arrangement — most commonly a Medicare Set-Aside (MSA) from a workers compensation or liability settlement — that designates funds for specific future medical expenses. The billed service falls within the scope of that set-aside, meaning the patient (or the set-aside fund) is responsible for paying rather than the insurer.

Set-aside arrangements are created during settlement negotiations to protect Medicare's interests. When a patient receives a settlement for an injury, a portion of the settlement funds is set aside to cover future medical expenses related to that injury. Medicare will not pay for those services until the set-aside funds are exhausted. This code restricts usage to the PR group code only, as it specifically designates patient financial responsibility.

How to Resolve

  1. Review the COB and set-aside details Determine which services are the patient's responsibility under the set-aside and which are covered by insurance.
  2. Submit to the appropriate payer For services outside the set-aside scope, submit to the responsible insurance payer.
Do Not Appeal This Code

Patient Responsibility via Set-Aside Arrangement grouped under OA is an Other Adjustment that doesn't fall into the standard contractual write-off or patient responsibility categories. Whether action is needed depends on the specific reason — review any accompanying RARC codes and payer guidance to decide whether this is a final adjustment to accept or an issue to resolve through resubmission.

How to Prevent OA-201

Also Filed As

The same CARC 201 may appear with different Group Codes:

PR-201 CO-201

Related Denial Codes

OA-74 — Indirect Medical Education Adjustment OA-75 — Direct Medical Education Adjustment OA-76 — Disproportionate Share Adjustment OA-85 — Patient Interest Adjustment OA-89 — Professional Fees Removed from Charges

Sources

  1. https://x12.org/codes/claim-adjustment-reason-codes
  2. https://www.mdclarity.com/denial-code/201
  3. https://portal.ct.gov/-/media/ohs/health-it-advisory-council/apcd-advisory-group/data-submission-guide-workgroup/meeting-materials/6-30-22/carc-codes_final.pdf
  4. Codes maintained by X12. Visit x12.org for official definitions.