OA-175: Incomplete Prescription

What Does OA-175 Mean?

OA-175 is rare and typically indicates the incomplete prescription issue was identified in a coordination of benefits context. The primary payer cannot adjudicate the claim due to the incomplete prescription, affecting the entire payer chain.

CARC 175 signals that the prescription attached to the claim does not contain all the information the payer requires for processing. Unlike CARC 173 (no prescription at all) or CARC 176 (expired prescription), this code specifically targets prescriptions that exist but are missing critical data elements. The payer reviewed the prescription and found gaps — missing dosage, absent physician signature, incomplete patient demographics, or lack of required supporting documentation.

This denial is heavily concentrated in pharmacy claims, DME orders, and any service type where a detailed written prescription is a reimbursement prerequisite. Electronic prescribing systems have reduced the frequency of this denial, but it still occurs frequently with handwritten orders, faxed prescriptions, and orders from providers who do not use standardized templates.

The code almost always appears with Group Code CO, placing responsibility squarely on the provider. The resolution is straightforward: identify what is missing, get it from the prescribing physician, and resubmit. The key challenge is often communication speed — tracking down the prescriber, getting them to amend or re-sign the order, and resubmitting within timely filing limits.

How to Resolve

Identify the specific missing prescription elements, obtain them from the prescribing physician, and resubmit the claim with a complete prescription.

1. Fix the prescription Obtain the complete prescription and resubmit to the primary payer. The COB processing cannot proceed until the primary payer adjudicates the claim properly.
2. Forward to secondary payer Once the primary payer processes the claim with the complete prescription, forward the updated ERA to the secondary payer.

Common RARC Pairings

The RARC code tells you exactly what triggered the OA-175:

How to Prevent OA-175

• Verify prescription completeness before submitting to any payer in the billing sequence
• Apply the same documentation standards regardless of which payer is the primary insurer

General Prevention

• Implement standardized prescription templates with required fields that must be completed before submission
• Use electronic prescribing systems with built-in prompts and required-field validation to prevent incomplete orders
• Train prescribing physicians and staff on what constitutes a complete prescription for each payer and service type
• Conduct regular audits of prescription documentation to identify common gaps and address systemic issues
• Collaborate with pharmacy staff to establish communication protocols for flagging incomplete prescriptions before claim submission
• Create checklists for billing staff to verify prescription completeness before submitting claims

Also Filed As

The same CARC 175 may appear with different Group Codes:

Related Denial Codes