OA-192: Non-Standard COB Adjustment Code

What Does OA-192 Mean?

OA-192 is the most common pairing and makes sense — the adjustment is classified as 'Other Adjustment' because it does not fit into standard contractual obligation or patient responsibility categories. The OA designation indicates that this is an informational COB adjustment, not a provider write-off or patient balance. The provider should use this information to correctly bill the secondary payer.

CARC 192 appears on your remittance when a payer uses a non-standard adjustment to communicate Coordination of Benefits information, typically in 837 transactions between payers. This code is specifically designed for situations where the primary payer made an adjustment that cannot be mapped to an existing standard CARC code for deductible, coinsurance, or co-payment — essentially a catch-all for COB adjustments that do not fit the normal categories.

This code behaves differently from most CARC codes because it is fundamentally informational rather than actionable. The primary payer is telling you (or the secondary payer) about an adjustment, but the adjustment itself may not represent a denial or a problem to fix. In practice, you will most commonly see CARC 192 when processing secondary claims — the primary payer's ERA includes this code to convey adjustment amounts that the secondary payer needs to know about for proper benefit coordination.

The key challenge with CARC 192 is interpretation. Because it is a non-standard catch-all, the specific meaning varies by payer. One payer may use it for a premium surcharge adjustment while another uses it for a plan-specific limitation that has no standard code equivalent. The ERA's accompanying RARC codes and any additional notes from the payer are critical for understanding what the adjustment actually represents and how to bill the secondary payer correctly.

Common Causes

How to Resolve

Review the primary payer's EOB for COB adjustment details, determine the correct secondary billing amount, and submit the secondary claim with accurate COB information.

1. Interpret the COB adjustment Review the ERA, RARC codes, and payer correspondence to understand what the non-standard adjustment represents. Determine how it affects the secondary billing calculation.
2. Bill the secondary payer Submit the secondary claim with the primary payer's EOB, correctly reflecting the payment, allowed amount, and all adjustments including the code 192 amount.
3. Reconcile payments After both payers have processed, reconcile the total payments received against the billed amount and determine any remaining patient responsibility.

Common RARC Pairings

The RARC code tells you exactly what triggered the OA-192:

How to Prevent OA-192

• Keep patient COB information current and verify coverage with all payers before service delivery
• Implement claims management software that can interpret and correctly process non-standard COB adjustments
• Maintain documentation of how each payer uses code 192 to streamline secondary billing for future claims
• Conduct regular audits of COB claims to identify and resolve recurring code 192 patterns

General Prevention

• Maintain accurate and up-to-date coordination of benefits information for all patients with multiple insurance coverage
• Implement claims management software that can properly interpret and map non-standard COB adjustments from primary payers
• Stay current with payer-specific policies on how they use code 192 and what adjustments it typically represents
• Conduct regular audits of COB claims to identify patterns in code 192 usage and streamline the secondary billing process
• Establish communication channels with payers to quickly resolve questions about non-standard COB adjustments

Also Filed As

The same CARC 192 may appear with different Group Codes:

Related Denial Codes