OA-76: Disproportionate Share Adjustment

What Does OA-76 Mean?

With OA (Other Adjustments), CARC 76 typically appears in a coordination of benefits (COB) context. In multi-payer situations, the primary payer's DSH adjustment passes to the secondary payer under OA. The financial responsibility depends on the specific arrangement between payers — review the primary payer's EOB and the COB terms to determine the correct course of action.

CARC 76 means the payer adjusted the payment based on disproportionate share adjustment. The reimbursement was calculated using the payer's fee schedule, contracted rate, or regulatory payment methodology rather than the billed charge.

Common scenarios that trigger this adjustment include: hospitals qualifying as disproportionate share hospitals receive an additional payment adjustment under Medicare's Inpatient PPS. CARC 76 reflects the difference between billed charges and the DSH-adjusted payment amount; The hospital's disproportionate patient percentage changed, affecting whether the hospital meets the DSH qualification threshold or the size of the DSH adjustment; The hospital's reported Medicaid fraction or SSI fraction used in the DSH calculation was inaccurate, resulting in an incorrect DSH payment adjustment. The group code paired with CARC 76 determines who bears the financial responsibility — CO places it on the provider as a contractual obligation, OA indicates a coordination of benefits or other payer adjustment, PR shifts it to the patient.

Common Causes

How to Resolve

1. Review the coordination of benefits Examine the OA-76 adjustment to understand how it fits within the primary/secondary payer relationship or other multi-payer context.
2. Verify primary payer adjudication Review the primary payer's EOB to understand the basis for the secondary payer's OA adjustment.
3. Determine the responsible party Based on the COB review, identify whether the adjustment should be absorbed, billed to another payer, or if additional documentation is needed.
4. Follow up Monitor the claim status and take additional action as needed based on the COB determination.

How to Prevent OA-76

• Verify all insurance coverage at admission for proper coordination of benefits sequencing
• Automate secondary claim workflows when OA adjustments appear on primary remittances

Also Filed As

The same CARC 76 may appear with different Group Codes:

Related Denial Codes