OA-260: Medicaid ACA Enhanced Fee Schedule Adjustment

What Does OA-260 Mean?

OA-260 appears when the Medicaid ACA fee schedule adjustment falls outside standard contractual or patient responsibility categories, typically in coordination of benefits scenarios. The primary Medicaid payer may apply this adjustment to indicate that a secondary payer or another Medicaid managed care plan should consider the remaining balance. The provider's next step depends on whether another payer is in the billing sequence.

When CARC 260 appears on a remittance, the Medicaid payer is telling you that the claim was adjudicated using the ACA Enhanced Fee Schedule rather than (or in addition to) the standard Medicaid fee schedule. This code was introduced in 2014 to support the Affordable Care Act's provision requiring states to increase Medicaid reimbursement for certain primary care services to Medicare-equivalent rates. The adjustment amount reflects the difference between what was billed and what the ACA-enhanced schedule allows.

In most cases, CARC 260 appears with Group Code CO, indicating a contractual write-off that the provider must absorb. This is not a denial in the traditional sense — the claim was processed and paid, but at a rate determined by the Medicaid ACA fee schedule. If the enhanced rate is lower than your billed amount, the difference is a contractual adjustment. If you expected the standard Medicaid rate and instead received the ACA-enhanced rate (which may be higher or lower depending on the service), the code serves as an informational flag.

Practices that treat a high volume of Medicaid patients should pay close attention to this code, especially during periods when states are transitioning into or out of ACA-enhanced rate programs. Fee schedule changes at the state level can retroactively affect reimbursement, and monitoring CARC 260 patterns can help you identify revenue cycle disruptions early. If you believe the wrong fee schedule was applied — for example, a service that should have been paid at the enhanced rate but was not — you have grounds to request reprocessing from the payer.

Common Causes

How to Resolve

Confirm the correct Medicaid fee schedule was applied, verify your provider enrollment supports ACA-enhanced rates, and either accept the contractual adjustment or request reprocessing.

1. Determine if a secondary payer exists Review the patient's insurance records to identify any secondary Medicaid managed care plan or other payer that should receive the balance after the OA-260 adjustment.
2. Forward the claim to the next payer If a secondary payer exists, submit the claim with the primary Medicaid remittance showing the OA-260 adjustment. The secondary payer will adjudicate based on their own fee schedule and coverage rules.
3. Post any remaining balance appropriately After all payers have adjudicated, post any remaining unpaid balance according to your Medicaid contract terms. Do not bill the patient for Medicaid contractual adjustments.

Common RARC Pairings

The RARC code tells you exactly what triggered the OA-260:

How to Prevent OA-260

• Collect and verify all Medicaid managed care plan assignments during patient registration to ensure correct primary and secondary payer sequencing
• Set up automated workflows that identify OA adjustments on Medicaid remittances and route them for secondary claim submission
• Monitor coordination of benefits patterns to catch systematic routing issues with Medicaid managed care organizations

General Prevention

• Verify patient Medicaid eligibility and the applicable fee schedule before rendering services using real-time eligibility verification tools
• Stay current with Medicaid ACA Enhanced Fee Schedule updates by regularly reviewing Medicaid provider bulletins and policy notices
• Ensure provider enrollment and credentialing records are up to date so claims qualify for enhanced Medicaid rates
• Use accurate CPT/HCPCS codes and required modifiers that align with ACA enhanced fee schedule eligible services
• Monitor denial trends for CARC 260 to identify systematic issues with fee schedule application across your Medicaid claims
• Implement automated claim scrubbing to catch coding errors before submission to Medicaid payers

Also Filed As

The same CARC 260 may appear with different Group Codes:

Related Denial Codes