OA-204: Service/Equipment/Drug Not Covered Under Benefit Plan

What Does OA-204 Mean?

OA-204 appears in coordination of benefits scenarios where the non-covered determination crosses multiple payers. The financial responsibility depends on the specific circumstances and may be resolved by billing a secondary payer.

CARC 204 flags that the item or service billed is not a covered benefit under the patient's insurance plan. This is one of the most impactful denial codes because it can apply to any service type — procedures, DME, prescriptions, or supplies — and the financial consequences vary significantly depending on whether the Group Code is PR or CO.

When paired with PR, the patient bears the financial burden. The payer has decided the service was not part of the patient's benefits, and the provider may bill the patient directly. When paired with CO, the provider absorbs the cost because contractual obligations prevent passing the charge to the patient. This distinction matters enormously for revenue recovery strategy.

Before assuming the service is genuinely non-covered, investigate coding accuracy. A surprising number of CARC 204 denials stem from incorrect CPT, HCPCS, or ICD-10 codes that make a covered service look non-covered. Missing authorization numbers and expired pre-certifications are also common triggers. Only after ruling out these fixable issues should the denial be treated as a true coverage exclusion.

How to Resolve

Determine whether the denial is due to a claim error or a genuine coverage exclusion, then either correct and resubmit or appeal with supporting documentation.

1. Review the primary payer's determination Understand why the primary payer denied coverage and whether the secondary payer may cover the service.
2. Bill the secondary payer Forward the claim with the primary payer's EOB to the secondary insurer for processing.

How to Prevent OA-204

• Verify all active insurance coverage and coordination of benefits order before billing

Also Filed As

The same CARC 204 may appear with different Group Codes:

Related Denial Codes