ICD-10-CM 2027 diagnosis code

T40.4X1DPoisoning by other synthetic narcotics, accidental (unintentional), subsequent encounter

Deleted in FY2021Requires 7th character

T40.4X1D was removed from ICD-10-CM in FY2021 and can't be reported for dates of service on or after October 1, 2020.Short description: Poisoning by oth synthetic narcotics, accidental, subs

Code last changed in FY2016 (effective October 1, 2015). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T40.4X1D

T40.4X1D was the ICD-10-CM code for poisoning by other synthetic narcotics, accidental (unintentional), subsequent encounter until it was deleted in FY2021. It can't be reported for dates of service on or after October 1, 2020.

7th character

Dsubsequent encounter

Other encounter types for T40.4X1:

Notes that apply from higher levels

Instructions written at a parent level also apply to T40.4X1D.

› From T40 Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

Excludes2

drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)

Broader instructions also apply from T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
FY2021 (effective 10/1/2020): Deleted

Common questions about T40.4X1D

Is T40.4X1D billable?: No. T40.4X1D was deleted in FY2021.