T42.6
Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 4 never code together
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 5
T42.6code
Inclusion terms
- Poisoning by, adverse effect of and underdosing of methaqualone
- Poisoning by, adverse effect of and underdosing of valproic acid
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 2
Alongside this code 8 same parent — T42
T42.0 Hydantoin derivatives category T42.1 Iminostilbenes category T42.2 Succinimides and oxazolidinediones category T42.3 Barbiturates category T42.4 Benzodiazepines category T42.5 Mixed antiepileptics category T42.7 Unsp antiepileptic and sedative-hypnotic drugs category T42.8 Antiparkns drug/centr muscle-tone depressants category
Subordinate codes 1
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.