T40.4X4Deleted in FY2021
Poisoning by other synthetic narcotics, undetermined
T40.4X4 was in use from FY2016 to FY2020. It was deleted on October 1, 2020 and is not valid for claims with dates of service on or after that date.
Use instead
CMS did not name a direct replacement. Look under T40.4 (Poisoning by, adverse effect of and underdosing of other synthetic narcotics) for the current codes.