ICD-10-CM 2027 diagnosis code
T42.6X3Poisoning by other antiepileptic and sedative-hypnotic drugs, assault
T42.6X3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Poisoning by oth antiepileptic and sed-hypntc drugs, assault
Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data
About T42.6X3
T42.6X3 is the ICD-10-CM diagnosis code for poisoning by other antiepileptic and sedative-hypnotic drugs, assault. It belongs to category T42 (poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs), block 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). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within T42.6X, choose T42.6X3 (Poisoning by other antiepileptic and sedative-hypnotic drugs, assault) only when documentation doesn't support a more specific option: poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional) (T42.6X1), poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm (T42.6X2), poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined (T42.6X4), adverse effect of other antiepileptic and sedative-hypnotic drugs (T42.6X5) and underdosing of other antiepileptic and sedative-hypnotic drugs (T42.6X6).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T42
Notes that apply from higher levels
Instructions written at a parent level also apply to T42.6X3.
› From T42.6 Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
- poisoning by, adverse effect of and underdosing of carbamazepine (T42.1-)
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.
Table of Drugs & Neoplasms entries
- Acecarbromal — Poisoning Assault
- Acetylcarbromal — Poisoning Assault
- Acetylpheneturide — Poisoning Assault
- Allylisopropylacetylurea — Poisoning Assault
- Allyltribromide — Poisoning Assault
- Ammonium › bromide — Poisoning Assault
- Anticonvulsant › hypnotic NEC — Poisoning Assault
- Anticonvulsant › pyrimidinedione — Poisoning Assault
- Anticonvulsant › specified NEC — Poisoning Assault
- Antiepilepsy agent › specified, NEC — Poisoning Assault
- Apronalide — Poisoning Assault
- Avomine — Poisoning Assault
- Barbexaclone — Poisoning Assault
- Beclamide — Poisoning Assault
- Beta-Chlor — Poisoning Assault
- Bromal (hydrate) — Poisoning Assault
- Bromide salts — Poisoning Assault
- Bromine › compounds (medicinal) — Poisoning Assault
- Bromine › sedative — Poisoning Assault
- Bromisoval — Poisoning Assault
- Bromisovalum — Poisoning Assault
- Bromoform — Poisoning Assault
- Bromural — Poisoning Assault
- Bromvaletone — Poisoning Assault
- Butyl › chloral (hydrate) — Poisoning Assault
- Butylchloral hydrate — Poisoning Assault
- Calcium › bromide — Poisoning Assault
- Calcium › bromolactobionate — Poisoning Assault
- Carbamate (sedative) — Poisoning Assault
- Carbromal — Poisoning Assault
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)
- No changes since FY2016.
Common questions about T42.6X3
Is T42.6X3 billable?
- No. T42.6X3 is a header code. Report one of its more specific subcodes instead.