CO-9Contractual ObligationCoding
CO-9 Denial Code: Diagnosis inconsistent with patient's age
The diagnosis is inconsistent with the patient's age.
Why CO-9 happens
- ●Age-specific ICD-10 code (newborn, pediatric, adult) mismatched to DOB
- ●Wrong DOB in the system
How to fix a CO-9 denial
- 1
Verify DOB and the ICD-10 age parameters
- 2
Correct and resubmit
How to prevent it
ICD-10 age edits in claim scrubbing.
Drowning in CO-9 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.