Diagnosis code ___ not effective for this DOS

REJECTION: Diagnosis code?__ not effective for this DOS

WHAT HAPPENED: The diagnosis code specified in box 21 cannot be billed for the date of service in box 24.

RESOLUTION: Check the diagnosis code’s effective date range in the ICD-10 database. If it was not valid for the date of service, replace it with a code that was active on that date. Update Box 21 and resubmit the claim.