CO-206Contractual ObligationProvider Enrollment
CO-206 Denial Code: NPI missing
A required National Provider Identifier is absent from the claim.
Why CO-206 happens
- ●Rendering/billing/attending NPI field left blank
- ●Atypical-provider billing where the payer still expects an NPI
How to fix a CO-206 denial
- 1
Add the required NPI(s) and resubmit
How to prevent it
Claim scrubber rules requiring NPIs in every mandatory loop.
Drowning in CO-206 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.