CO-B20Contractual ObligationDuplicate
CO-B20 Denial Code: Partially/fully furnished by another provider
Another provider already furnished some or all of this service — overlapping claims for the same work.
Why CO-B20 happens
- ●Split care where both providers billed the full service
- ●Locum/coverage arrangements billed by both parties
How to fix a CO-B20 denial
- 1
Coordinate with the other provider; rebill your actual portion with correct modifiers (54/55/56 for split surgical care)
How to prevent it
Define billing ownership in coverage and co-management arrangements up front.
Drowning in CO-B20 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.