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CO-265 Code: Pharmaceutical Administrative Cost Adjustment

CO-265 is an adjustment for administrative cost, restricted to pharmaceuticals. The payer reduced or declined an administrative charge associated with a drug, such as a handling or processing fee added to the prescription claim.

Quick facts

Code
CO-265 (CARC 265)
Status
Active In use since November 1, 2014; last modified July 1, 2017.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The administrative cost not paid is a pharmacy or provider write-off under the contract and generally cannot be billed to the patient.
Official description
Adjustment for administrative cost. Usage: To be used for pharmaceuticals only.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CO-265 means

CARC 265 reads adjustment for administrative cost, and its usage note says it is to be used for pharmaceuticals only. It identifies an adjustment to overhead-type charges tied to a drug, not to the ingredient cost and not to the clinical service of giving the drug.

A common source of confusion is the word administrative. In clinical billing, “drug administration” means the injection or infusion service. CARC 265 has nothing to do with that. It refers to administrative costs such as handling or processing fees. If a drug administration service was denied, a different reason code would apply.

Compared with CO-212, which covers administrative surcharges on any kind of claim, CO-265 is narrower and pharmacy-focused.

Where it comes from

  • Handling or processing fees added to drug claims that the payer’s agreement does not recognize.
  • Specialty pharmacy service fees billed separately from the dispensing fee.
  • Program administration charges in certain drug programs that the plan does not reimburse.
  • Fees above the contracted amount where some administrative reimbursement exists.

Because administrative fees are defined differently from one contract to another, the same charge can be paid by one plan and adjusted by the next. Before billing an administrative fee to a new payer, confirm in writing how that payer classifies it. If the payer considers the work part of the dispensing fee, the separate charge will keep returning as CO-265.

How to respond

  1. Separate the components. Identify the ingredient cost, dispensing fee, and administrative charge on the claim, and which one was adjusted.
  2. Check contract definitions of reimbursable administrative costs.
  3. If covered, send a reprocessing request that quotes the contract.
  4. If not covered, post the write-off and stop sending the charge to that payer.
  5. Never shift it to the patient under the CO group.

How to prevent problems

  • Define every add-on charge in your pharmacy system and map which payers accept it.
  • Review new contracts for their treatment of administrative and service fees.
  • Watch for CO-265 patterns after a payer changes its pharmacy program; an ERA Analyzer can show when a formerly paid fee starts getting adjusted.

Remark codes that may appear with CO-265

  • N381 (Alert: Consult our contractual agreement for restrictions/billing/payment information related to these charges.): Directs you to the contract terms that govern administrative fees.
  • CO-212 (Administrative surcharges are not covered): Administrative surcharges that are not covered, used for claims generally rather than pharmaceuticals only.
  • CO-262 (Adjustment for delivery cost.): Delivery cost for pharmaceuticals.
  • CO-266 (Adjustment for compound preparation cost.): Compound preparation cost for pharmaceuticals.
  • CO-263 (Adjustment for shipping cost.): Shipping cost for pharmaceuticals.

CO-265 FAQ

What is an administrative cost on a drug claim?

It can include handling, processing, or other overhead charges a pharmacy or supplier adds to a drug claim. What qualifies depends on the payer's definitions and your contract.

How is CO-265 different from CO-212?

CO-212 is a general code for non-covered administrative surcharges on any claim. CO-265 is specific to pharmaceuticals and describes an adjustment to an administrative cost rather than a flat non-coverage statement.

Does CO-265 mean the drug administration was denied?

No. Drug administration (injecting or infusing a drug) is a clinical service billed with its own codes. CO-265 is about administrative overhead, not administering the drug.

Should CO-265 be counted as a denial?

Usually not. It is a cost-component adjustment on a drug claim, so tracking it separately from true denials gives a clearer picture of both.