CO 89 denial code

Claim adjustment reason code 89. Often reported as CO 89.

Professional fees removed from charges

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 89 means

The payer took professional fee amounts out of a facility claim because they belong on a separate professional claim.

A facility claim included charges for a physician's or other practitioner's professional work. The payer pays those services only on the practitioner's own claim, so it removed them from the facility bill.

This is common on institutional claims where professional components were rolled into facility charges, or where a hospital bills for practitioners it employs under a different arrangement.

Group codes seen with 89

On a remittance, 89 comes after a group code. These are the ones it is most often reported with:

• CO 89 (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

• Professional component revenue codes were billed on the facility claim for a payer that does not accept them there.
• The practitioner's services should have gone on a separate professional claim.
• The facility's billing setup includes professional fees by default for some services.

What to do next

1. Identify which lines held professional charges and whether the practitioner billed them separately.
2. Bill the professional services on the correct claim type if they were not billed yet.
3. Update charge master or billing rules so professional fees are split out for this payer.
4. Check the contract to confirm the payer does not allow combined billing for the setting.

Related codes

• 97 (reason code) Service included in another payment
• 16 (reason code) Missing information or billing error