CARC 180 Active

OA-180: Patient Has Not Met Residency Requirements

TL;DR

A residency issue was flagged during coordination of benefits. Determine which payer identified the problem.

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-180 Mean?

With OA (Other Adjustments), the residency issue was identified during coordination of benefits. Review the COB details to determine which payer flagged the residency problem and whether another payer covers the service regardless of residency.

CARC 180 appears when a payer determines that the patient does not reside within the geographic area required for coverage. Many insurance plans, particularly Medicaid programs and HMOs, require patients to live within a defined service area. If the patient's address falls outside this area, the payer will deny the claim.

This code is most common with state Medicaid programs that require physical residency within the state, HMO plans with defined service area boundaries, and plans that restrict coverage to specific geographic regions. The denial may result from an actual residency issue, an outdated address on file, or a recent relocation that has not been reflected in the patient's enrollment records.

How to Resolve

  1. Review COB details Identify which payer in the coordination chain flagged the residency issue.
  2. Submit proof of residency if applicable If the patient meets residency requirements for one payer, ensure that documentation is on file.
  3. Submit to the correct payer If the residency issue affects only one payer, submit to the other payer that covers the patient's current location.
Do Not Appeal This Code

Patient Has Not Met Residency Requirements 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-180

Also Filed As

The same CARC 180 may appear with different Group Codes:

CO-180 PR-180

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://www.mdclarity.com/denial-code-carcs
  2. https://x12.org/codes/claim-adjustment-reason-codes
  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. https://medicaid-documents.dhhs.utah.gov/Documents/pdfs/ClaimDenialCodes.pdf
  5. Codes maintained by X12. Visit x12.org for official definitions.