OA-117: Transportation to Nearest Facility

What Does OA-117 Mean?

OA-117 is an informational adjustment indicating that the transportation coverage limitation was applied outside the standard contractual framework. This may occur in coordination of benefits situations where the primary payer already processed the transportation claim and the secondary payer is reflecting the nearest-facility limitation. The financial outcome depends on the specific circumstances of the multi-payer arrangement.

When CARC 117 appears on a remittance, the payer is telling you that the transportation service billed was to a facility that is not the nearest one capable of providing the patient's required care. Payers enforce this limitation to control transportation costs while ensuring patients still have access to appropriate medical services. The adjustment applies the coverage rule that transportation benefits are limited to the shortest reasonable distance to an adequate provider.

This code surfaces most often in ambulance and non-emergency medical transportation (NEMT) claims. The payer's system compares the destination facility against its network of providers and determines whether a closer facility could have delivered the same level of care. If a closer option exists, the claim for the additional distance is denied under CO-117. The denial does not necessarily mean the transportation was inappropriate — only that the payer's coverage policy limits reimbursement to the nearest qualifying facility.

Providers who routinely transport patients to specialized facilities that are not the closest option need robust documentation practices. A physician's certification of medical necessity, a written statement explaining why the nearest facility was inadequate, and records showing the patient's clinical requirements can all support an appeal. Without this documentation, the provider absorbs the cost as a contractual write-off.

How to Resolve

Verify whether the facility was the nearest appropriate option, gather supporting documentation, and appeal if the farther facility was medically necessary.

1. Review the coordination of benefits arrangement Determine how the transportation benefit is split between payers and whether the OA adjustment reflects the primary payer's nearest-facility determination.
2. Verify the nearest-facility calculation is correct Confirm the payer's nearest-facility determination is accurate and that the same limitation was applied consistently across the primary and secondary payers.
3. Appeal if the adjustment is applied in error If the OA adjustment does not align with the coordination of benefits arrangement, contact the payer for clarification and file an appeal if warranted.

How to Prevent OA-117

• Coordinate transportation billing across primary and secondary payers to ensure nearest-facility rules are applied consistently
• Verify coordination of benefits status before submitting transportation claims to avoid unexpected adjustments

Also Filed As

The same CARC 117 may appear with different Group Codes:

Related Denial Codes