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ICD-10-CM · FY 2026 APRIL UPDATE

T42.7

Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T42.71Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional)Category
T42.71XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounterBillable
T42.71XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounterBillable
T42.71XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequelaBillable
T42.72Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harmCategory
T42.72XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounterBillable
T42.72XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounterBillable
T42.72XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequelaBillable
T42.73Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assaultCategory
T42.73XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounterBillable
T42.73XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounterBillable
T42.73XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequelaBillable
T42.74Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undeterminedCategory
T42.74XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounterBillable
T42.74XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounterBillable
T42.74XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequelaBillable
T42.75Adverse effect of unspecified antiepileptic and sedative-hypnotic drugsCategory
T42.75XAAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounterBillable
T42.75XDAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounterBillable
T42.75XSAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, sequelaBillable
T42.76Underdosing of unspecified antiepileptic and sedative-hypnotic drugsCategory
T42.76XAUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, initial encounterBillable
T42.76XDUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounterBillable
T42.76XSUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, sequelaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.