Denial code CO-97: Service bundled into another payment
The payer considers this service part of another service already paid, so it carries no separate payment.
The benefit for this service is included in the payment/allowance for another service or procedure that has already been adjudicated.
What CO-97 actually means
CO-97 is a bundling edit. The payer applied NCCI or its own bundling logic and folded this line into a procedure it already paid. It is correct far more often than not — but where the service really was separate and distinct, the correct modifier makes it separately payable, and that distinction is where the recoverable dollars sit. Blanket-appealing every CO-97 wastes effort; blanket-writing-off every CO-97 quietly forfeits legitimate payment.
Why this denial happens
- The service is genuinely a component of a comprehensive procedure already paid.
- A distinct-service modifier (59 or an X{EPSU} subset) was required and not appended.
- The service fell within the global surgical period of a paid procedure.
- An E/M service was billed without modifier 25 alongside a procedure.
How to resolve a CO-97 denial
- Check the NCCI edit pair to see whether a modifier is even permitted to override it.
- Where documentation supports a genuinely separate service and a modifier is allowed, append it and resubmit.
- Where the service falls inside a global period, confirm whether a global-period modifier applies.
- Otherwise post the adjustment — bundled amounts are not billable to the patient under most agreements.
How to prevent it
- Run NCCI edits pre-submission rather than discovering pairs on the remittance.
- Document the distinct nature of separately billed services at the time of the encounter.
Frequently asked
What does denial code CO-97 mean?
The payer considers this service part of another service already paid, so it carries no separate payment. The X12 description reads: "The benefit for this service is included in the payment/allowance for another service or procedure that has already been adjudicated."
How do I fix a CO-97 denial?
Check the NCCI edit pair to see whether a modifier is even permitted to override it. Where documentation supports a genuinely separate service and a modifier is allowed, append it and resubmit. Where the service falls inside a global period, confirm whether a global-period modifier applies. Otherwise post the adjustment — bundled amounts are not billable to the patient under most agreements.
Can CO-97 be billed to the patient?
Generally no. The recommended path for this code is "appeal or correct and resubmit" — check your payer agreement before transferring any balance to the patient.
Related denial codes
Related billing terms
See how much CO-97 is costing you
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General revenue-cycle guidance, not legal, coding, or payer-specific advice. Claim adjustment reason codes are maintained by X12 and are revised periodically; payer policy and your provider agreement govern in any specific case. Always read the remark codes transmitted with the denial — they frequently carry the detail this code does not.