CO-177Contractual ObligationEligibility
CO-177 Denial Code: Eligibility requirements not met
The patient hasn't met a plan eligibility requirement — broader than termination: think unmet program criteria.
Why CO-177 happens
- ●Program-specific criteria (age, condition, enrollment step) unmet on the DOS
- ●Eligibility category mismatch for the service
How to fix a CO-177 denial
- 1
Get the specific unmet requirement from the payer; correct or route to the right program
How to prevent it
Verify program-level eligibility (not just active coverage) for program-bound services.
Drowning in CO-177 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.