CO-146Contractual ObligationCoding
CO-146 Denial Code: Diagnosis was invalid for the date of service
Payment denied because the diagnosis was invalid for the date(s) of service reported.
Why CO-146 happens
- ●Deleted/replaced ICD-10 code used after its end date
- ●New ICD-10 code used before its October 1 effective date
How to fix a CO-146 denial
- 1
Look up the valid code set for the DOS
- 2
Correct the diagnosis and resubmit
How to prevent it
Update ICD-10 tables every October 1 without fail.
Drowning in CO-146 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.