CO-299Contractual ObligationProvider Enrollment
CO-299 Denial Code: Billing provider not eligible for payment
The billing provider (the entity, not the rendering clinician) isn't eligible to receive payment — enrollment, revalidation, or sanction issues at the organization level.
Why CO-299 happens
- ●Group enrollment lapsed or revalidation missed
- ●Billing NPI/TIN sanctioned or deactivated
How to fix a CO-299 denial
- 1
Resolve the organizational enrollment issue with the payer; request reprocessing back to the eligibility fix date
How to prevent it
Calendar revalidation deadlines for every group enrollment — a lapse stops ALL payment.
Drowning in CO-299 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.