OA 225 denial code

Claim adjustment reason code 225. Often reported as OA 225.

Payer penalty or interest

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 225 means

A penalty or interest amount paid by the payer, reported only for plan to plan encounter reporting.

This is used on outgoing encounter data between plans, not on a normal remittance to a provider. It accounts for penalty or interest money the payer paid on the claim.

Billing staff rarely need to act on it. If you see it on a provider remittance, ask the payer what it represents.

Group codes seen with 225

On a remittance, 225 comes after a group code. These are the ones it is most often reported with:

• OA 225 (Other Adjustment): Used for adjustments that are neither the provider's contractual write-off nor the patient's share. It often appears with coordination of benefits, for example when another payer already paid.

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

• A managed care plan reported interest it paid on a late claim in encounter data.
• A plan reported a prompt pay penalty to another plan or program.
• A delegated entity reported penalty amounts upstream.

What to do next

1. Confirm whether the code appears on encounter data rather than your remittance.
2. Post any interest received to the interest account, not to the patient balance.
3. Ask the payer to clarify if the code appears on a provider remittance.

Related codes

• 237 (reason code) Legislated or regulatory penalty
• 223 (reason code) Mandated adjustment with no specific code