The CO-263 denial code appears when a plan reduces or refuses the shipping cost a pharmacy added to a prescription claim. Mail-order and specialty pharmacies see it most, because they ship drugs by carrier, sometimes overnight and cold. The drug and the dispensing fee can pay normally while the shipping amount is written down. (Primary source: X12 Claim Adjustment Reason Codes)
In brief: reason code 263 reads “Adjustment for shipping cost. Usage: To be used for pharmaceuticals only.” Under Medicare Part D, shipping is part of the dispensing fee, so a separate shipping charge is rarely paid. Write it off unless your contract says otherwise.
Part of our denial codes library. Written by Manikandan J, CPC, CRCR, who has audited mail-order and specialty pharmacy remits for shipping and handling write-offs. Published 27 October 2026. Last updated: 27 October 2026. Code wording quoted word for word from X12. Read about the author and our editorial policy, or contact us to report an error.
Official CARC 263 description
| Field | Value |
|---|---|
| Code | 263 |
| Description | “Adjustment for shipping cost. Usage: To be used for pharmaceuticals only.” |
| Start | 11/01/2014 |
| Last modified | 07/01/2017 |
Source: X12 Claim Adjustment Reason Codes, checked 27 October 2026. On the NCPDP pharmacy claim, shipping is qualifier 02 in field 479-H8, with the amount in 480-H9 (Nebraska Medicaid D.0 payer sheet).
Key terms: A CARC is a Claim Adjustment Reason Code from the X12 list, and it says why a line was paid differently than billed. A RARC is a Remittance Advice Remark Code that adds detail to the CARC. The group code is the two-letter prefix on the adjustment; CO means contractual obligation: the provider owns the balance and it cannot be billed to the patient.
Methodology: the code wording above is copied from the X12 list, and each fix step below links to the payer or CMS page it comes from.
Example scenario (fictional names), part 1
CO-263 Denial Example: What Happened
Lena Park runs reimbursement for Northwind Specialty Rx, a fictional specialty pharmacy. It ships a refrigerated biologic overnight in an insulated box with ice packs. Each claim to a Medicare Part D plan carried a $38 shipping charge, qualifier 02.
The plan paid the drug and the dispensing fee. The 835 showed CAS*CO*263*38.00 on every fill. After a quarter, the pharmacy had $4,560 in unpaid shipping for that plan alone.
Is this an error the plan should fix, or a cost the pharmacy has to carry? Keep reading, or jump to how it was resolved. Keep reading, or jump to how the CO-263 denial was resolved.
Why Part D plans cut shipping charges
The Part D rule defines dispensing fees to include pharmacy costs of getting the drug into the patient’s hands. The list in 42 CFR 423.100 names, for example, delivery and special packaging along with the pharmacist’s time and the facility (eCFR, 42 CFR 423.100). So, for Part D, the plan expects shipping to be covered by the negotiated dispensing fee, not by a separate line.
Commercial and Medicaid plans set their own rules in the payer sheet and the network contract. Some accept 480-H9 for shipping, and many ignore it.
Shipping, delivery and postage: which code?
| Cost | NCPDP qualifier (479-H8) | CARC |
|---|---|---|
| Local delivery by staff or courier | 01 | CO-262 |
| Carrier shipping, such as overnight cold-chain | 02 | CO-263 |
| Postage for mailed fills | 03 | CARC 264 |
The qualifier you send decides which CARC comes back. Sending a carrier fee as delivery does not make it payable; it only changes the code on the remit.
How to work a CO-263 adjustment
- Confirm the line. The CO-263 amount should match what you sent in 480-H9 with qualifier 02, less any shipping paid back in 565-J4.
- Check the plan type. For Part D, treat shipping as part of the dispensing fee unless your contract pays it separately.
- Read the payer sheet and contract. Look for a shipping or cold-chain allowance, often limited to listed specialty drugs.
- Post the write-off. CO means the patient cannot be billed this amount on the claim.
- Negotiate, if the cost is real. Bring your shipping cost data to the dispensing fee talks rather than adding it claim by claim.
Claim form note
No claim form visual is shown here. CARC 263 is for pharmaceuticals only, and shipping is claimed on the NCPDP pharmacy claim, so there is no CMS-1500 box or UB-04 form locator to fix.
Example scenario (fictional names), part 2
How the CO-263 Denial Was Resolved
Lena pulled the plan’s network agreement. It set one dispensing fee for specialty fills and had no shipping term. The payer sheet listed 480-H9 as not used for this plan.
Fix: she wrote off the $4,560 as contractual and turned off the shipping charge in the billing profile for the Part D plan. She kept it for one commercial plan whose contract pays a cold-chain fee.
Outcome: remits for the Part D plan came back clean. At renewal, Lena used the quarter’s shipping cost, about $38 per fill, to argue for a higher specialty dispensing fee.
Names and details are illustrative; no real patient data.
Names and details are illustrative; no real patient data.
Related codes
| Code | Meaning | Where to start |
|---|---|---|
| CO-91 | Dispensing fee adjustment | Contract fee |
| CO-90 | Ingredient cost adjustment | Drug price |
| CO-45 | Charge over the fee schedule | Contract rate |
FAQ
What does CO-263 mean?
The plan reduced or refused the shipping cost on a pharmacy claim.
Does Medicare Part D pay shipping separately?
Usually not. The Part D rule counts delivery and packaging as dispensing fee costs.
Can the pharmacy charge the patient for shipping after CO-263?
Not this claim amount, because the group is CO. Separate patient fees depend on your contract and state law.
Which field carries shipping on the claim?
480-H9, with qualifier 02 in 479-H8.
Is CO-263 the same as CO-262?
No. CARC 262 is delivery cost (qualifier 01). CARC 263 is shipping cost (qualifier 02).
Sources
How we checked: the CARC 263 quote was matched word for word with the X12 CARC list on 27 October 2026, and the dispensing fee definition with the eCFR.
- X12, Claim Adjustment Reason Codes (CARC 263). Accessed 27 Oct 2026.
- eCFR, 42 CFR 423.100 (dispensing fees definition). Accessed 27 Oct 2026.
- Nebraska Medicaid, NCPDP D.0 payer specification. Accessed 27 Oct 2026.
- New York EPIC, NCPDP D.0 payer specifications (2025). Accessed 27 Oct 2026.
Last updated: 27 October 2026 · Educational content; not legal advice.
Related denial codes
- CO-262: Pharmacy Delivery Cost Adjustment
- CO-211: NDC Not Eligible for Rebate
- CO-205: Pharmacy Discount Card Processing Fee
- CO-188: Covered Only When Used per FDA Recommendations
- CO-176: Prescription Is Not Current
- CO-175: Prescription Is Incomplete
- CO-174: Service Was Not Prescribed Prior to Delivery
- CO-173: Service or Equipment Was Not Prescribed by a Physician