CO 232 denial code

Claim adjustment reason code 232. Often reported as CO 232.

Institutional transfer amount

Unofficial reference. This is our own plain-English explanation, not the official code text. Payer rules differ. Verify with the payer and the official X12 code list. AlphaPrefix is not affiliated with X12, CMS or any payer. Data last updated Nov 11, 2026.

What 232 means

The DRG payment was reduced because the patient's care was split across more than one institution through a transfer.

When a patient moves from one hospital to another, the first facility often gets a per diem share of the DRG instead of the full amount. This code explains that difference.

It applies only to institutional claims. The adjustment is driven by the patient discharge status and the length of stay.

Group codes seen with 232

On a remittance, 232 comes after a group code. These are the ones it is most often reported with:

• CO 232 (Contractual Obligation): The provider's side of the ledger. The reduction comes from the payer contract or a rule the provider has to follow, and the patient normally cannot be billed for it.

The payer chooses the group code for each adjustment, so the same reason code can appear with another group code on your remittance. Read the two together. More about group codes.

Common causes

• The patient was transferred to another acute hospital before the expected length of stay.
• A discharge to post acute care triggered a transfer payment policy.
• The discharge status code on the claim shows a transfer.

What to do next

1. Confirm the discharge status code matches where the patient actually went.
2. Correct the discharge status and resubmit if the patient was not transferred.
3. Check that the transfer payment was calculated using the right length of stay.

Related codes

• 45 (reason code) Charge exceeds the allowed amount
• 16 (reason code) Missing information or billing error
• 249 (reason code) Claim flagged as a readmission