OA-B15: Qualifying Service/Procedure Not Received

What Does OA-B15 Mean?

OA-B15 occurs when the prerequisite requirement involves services covered by a different payer and the current payer cannot verify that the qualifying service was completed. This coordination issue prevents the dependent claim from being processed.

CARC B15 represents a service dependency denial. The payer requires that a specific qualifying service or procedure be performed and adjudicated before it will cover the billed claim, and that prerequisite has not been met. Think of it as a gatekeeper rule — the payer will not pay for step two until step one is confirmed. This is distinct from prior authorization requirements; B15 specifically concerns a clinical prerequisite service, not an administrative approval.

Common examples include follow-up procedures that require an initial evaluation to be completed and paid first, advanced diagnostic tests that require a basic screening test to be covered first, and treatment escalations that require documentation of a failed initial therapy. If the qualifying service claim is sitting in a processing queue, the dependent claim will be denied with B15 even though both services were legitimately performed. The denial is timing-based in these cases — the payer cannot approve the dependent service until the prerequisite service claim is resolved.

B15 typically pairs with Group Code CO because the prerequisite requirement is a payer processing rule that the provider is expected to manage. The resolution path depends on the root cause: if the qualifying service was performed but not yet billed, submit that claim first. If it was billed but still pending, follow up with the payer to expedite processing. If the qualifying service was never performed, determine whether it is clinically appropriate and schedule it. Once the prerequisite claim is adjudicated, the dependent claim can be resubmitted and should process normally.

Common Causes

How to Resolve

Identify the missing qualifying service, ensure it has been performed and adjudicated, then resubmit the dependent claim.

1. Obtain prerequisite documentation from the other payer Get the remittance from the payer that processed the qualifying service and include it with the dependent claim resubmission.
2. Resubmit with proof of prerequisite completion Resubmit the dependent claim with documentation showing the qualifying service was performed and adjudicated by the other payer.

Common RARC Pairings

The RARC code tells you exactly what triggered the OA-B15:

How to Prevent OA-B15

• Include cross-payer documentation of qualifying services when submitting dependent claims to secondary or tertiary payers
• Coordinate with all payers in the patient's coverage chain to ensure prerequisite requirements are met across the board

General Prevention

• Maintain a reference list of procedures that require qualifying prerequisite services and verify the prerequisite was completed before scheduling the dependent procedure
• Submit claims for qualifying services promptly to ensure they are adjudicated before the dependent service claim is filed
• Implement billing system edits that check for qualifying service claims before allowing submission of dependent procedure claims
• Train billing staff on payer-specific prerequisite requirements and bundling rules
• Use correct CPT codes for both qualifying and dependent services to ensure the payer can link them properly

Also Filed As

The same CARC B15 may appear with different Group Codes:

Related Denial Codes