T42.74 ICD-10-CM Code: Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T42.74 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.--F19.-)
- abuse and dependence of psychoactive substances (F10-F19)
- abuse of non-dependence-producing substances (F55.-)
- immunodeficiency due to drugs (D84.821)
- drug reaction and poisoning affecting newborn (P00-P96)
- pathological drug intoxication (inebriation) (F10-F19)
Code First
Underlying conditions that must be sequenced before this code.
- Code first, for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS (T88.7)
- aspirin gastritis (K29.-)
- blood disorders (D56-D76)
- contact dermatitis (L23-L25)
- dermatitis due to substances taken internally (L27.-)
- nephropathy (N14.0-N14.2)
Use Additional Code
Supplementary codes the tabular list directs you to add.
- Use additional code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Can T42.74 be billed directly?
No. T42.74 (Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does T42.74 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T42.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T42.74 in its code family, with their registry titles.
- T42.72XS — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela
- T42.73 — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault
- T42.73XA — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounter
- T42.73XD — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter
- T42.73XS — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequela
- T42.74XA — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter
- T42.74XD — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter
- T42.74XS — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequela
- T42.75 — Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs
- T42.75XA — Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter
Associated Substances (7)
Substances from the official ICD-10-CM Table of Drugs and Chemicals that map to this code.
- Anticonvulsant
- Antiepilepsy agent
- Hypnotic
- Sedative NEC
- Sleeping draught, pill
- Soporific
- Soporific drug