CO-97 denial: Bundled service
The payer says this service is already included in the payment for another service billed the same day.
Common causes
- A bundling edit treats the two services as one
- A separate, distinct service was billed without the modifier that shows it
- The services really are meant to be paid together
How to fix it
- Check the payer's bundling edits for the two codes
- If the services were truly separate, submit a corrected claim with the right modifier and notes that support it
- If they were not, accept the bundling and adjust off the balance
How to prevent it
- Check bundling edits for common code pairs before billing
- Document separate, distinct services clearly so the modifier is supportable
Zenith billers and AR specialists work denials like this inside your practice-management system, and your practice stays the billing provider. See AR follow-up and medical billing.
Educational summary, not billing or legal advice. Payer rules and deadlines vary; always check the payer’s own policy and the remark code on your remittance.