CO-280: Medical Plan Benefits Not Available - Submit to Pharmacy

What Does CO-280 Mean?

CO-280 means the medical plan is adjusting the claim as a contractual obligation because the service belongs under the pharmacy benefit. This is not a traditional denial to appeal — it is a billing redirection. The provider must submit the claim to the patient's pharmacy benefit manager instead. The CO adjustment protects the patient from being billed for a service that is actually covered, just by a different plan.

CARC 280 fires when a payer's medical plan receives a claim for a service that belongs under the patient's pharmacy benefit. This is not a traditional denial — it is a redirection. The medical plan is telling you that the service (typically a medication, infusion therapy, or specialty pharmacy item) is covered, but by the pharmacy plan rather than the medical plan.

This code is distinct from CARC 292, which indicates the medical plan has already forwarded the claim to the pharmacy plan. With CARC 280, the medical plan has not forwarded the claim — the provider must obtain the patient's pharmacy plan information and resubmit directly.

The split between medical and pharmacy benefits is increasingly common as payers carve out pharmacy benefits to separate pharmacy benefit managers (PBMs). Self-administered specialty medications, certain injectable drugs, and infusion therapies frequently fall into the pharmacy benefit rather than the medical benefit, and the rules vary by payer and plan design.

Common Causes

How to Resolve

1. Identify the pharmacy plan Obtain the patient's pharmacy plan information — PBM name, BIN number, PCN, and group number from the patient's pharmacy card or by calling the medical plan for the associated pharmacy plan details.
2. Verify pharmacy coverage Contact the PBM or check their online formulary to confirm the service is covered under the pharmacy benefit and determine any prior authorization requirements.
3. Resubmit to the pharmacy plan Submit the claim to the patient's pharmacy plan using the appropriate pharmacy billing format and codes.
4. Handle dual denials If the pharmacy plan also denies the service, contact both plans to determine where coverage exists and whether the service falls into a gap between medical and pharmacy benefits.
5. Monitor for processing Track the pharmacy plan submission and follow up if no remittance is received within the expected processing timeframe.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-280:

How to Prevent CO-280

• Verify whether services are covered under the medical or pharmacy benefit before submitting claims
• Collect both medical and pharmacy insurance information from patients at registration
• Maintain a reference of which drugs and services are typically billed under pharmacy vs. medical benefits for each major payer
• Coordinate with the patient's pharmacy plan when billing specialty medications or infusion therapies
• Stay updated on payer-specific medical vs. pharmacy benefit carve-out policies

General Prevention

• Verify whether services are covered under the medical or pharmacy plan before claim submission
• Coordinate properly between medical and pharmacy plan billing
• Maintain current knowledge of which services fall under medical vs pharmacy benefits for each payer
• Train staff on proper claim routing between medical and pharmacy plans
• Implement pre-submission verification checks for drug-related claims

Also Filed As

The same CARC 280 may appear with different Group Codes:

Related Denial Codes