234: This procedure is not paid separately.
This procedure is considered part of another service's payment and does not receive its own separate reimbursement, similar in spirit to code 97 but often used for bundled ancillary or facility services.
What the group code means
- CO
- Contractual Obligation. The provider is responsible and the amount cannot be billed to the patient.
Why it fires
- The code is designated as bundled or not separately payable under the payer's fee schedule status indicator
- The service is always included in the payment for a related primary procedure or per diem or facility rate
Corrective actions, ranked
- 1
Check the fee schedule status indicator
Confirm whether CMS or the payer designates this code as bundled or not separately payable.
- 2
Verify it was billed with the correct primary code
Ensure the procedure this code bundles into was billed correctly and paid.
- 3
Write off per policy
If correctly bundled, adjust off the amount as a standard contractual write off.
Is it worth appealing
Rarely appealable since this reflects a fixed payment policy. Only dispute if the code is being bundled incorrectly under a policy that does not actually apply to this service.
Retrieved 2026-07-18.
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DenialPath provides billing and administrative guidance based on published CMS and X12 sources. It is not medical advice, not a coverage determination, and not a guarantee of payment. NCCI and MUE edits are republished quarterly and payer policies vary by contract. Always confirm against the payer's own current policy before submitting or appealing.