CO-50Contractual ObligationMedical Necessity
CO-50 Denial Code: Not deemed medically necessary
These services are non-covered because the payer deems them not medically necessary.
Why CO-50 happens
- ●Diagnosis on claim does not meet LCD/NCD or payer policy criteria
- ●Frequency limits exceeded for the service
- ●Documentation does not support the level of service
How to fix a CO-50 denial
- 1
Compare the claim against the payer's medical policy
- 2
Appeal with clinical documentation, physician notes, and policy citations
- 3
If patient signed an ABN/waiver, bill the patient as allowed
How to prevent it
Check medical policy and frequency limits pre-service; obtain ABNs where appropriate.
Drowning in CO-50 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.