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ICD-10-CM · FY 2026 APRIL UPDATE

T42.3X

Poisoning by, adverse effect of and underdosing of barbiturates

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
T42.3X1Poisoning by barbiturates, accidental (unintentional)Category
T42.3X1APoisoning by barbiturates, accidental (unintentional), initial encounterBillable
T42.3X1DPoisoning by barbiturates, accidental (unintentional), subsequent encounterBillable
T42.3X1SPoisoning by barbiturates, accidental (unintentional), sequelaBillable
T42.3X2Poisoning by barbiturates, intentional self-harmCategory
T42.3X2APoisoning by barbiturates, intentional self-harm, initial encounterBillable
T42.3X2DPoisoning by barbiturates, intentional self-harm, subsequent encounterBillable
T42.3X2SPoisoning by barbiturates, intentional self-harm, sequelaBillable
T42.3X3Poisoning by barbiturates, assaultCategory
T42.3X3APoisoning by barbiturates, assault, initial encounterBillable
T42.3X3DPoisoning by barbiturates, assault, subsequent encounterBillable
T42.3X3SPoisoning by barbiturates, assault, sequelaBillable
T42.3X4Poisoning by barbiturates, undeterminedCategory
T42.3X4APoisoning by barbiturates, undetermined, initial encounterBillable
T42.3X4DPoisoning by barbiturates, undetermined, subsequent encounterBillable
T42.3X4SPoisoning by barbiturates, undetermined, sequelaBillable
T42.3X5Adverse effect of barbituratesCategory
T42.3X5AAdverse effect of barbiturates, initial encounterBillable
T42.3X5DAdverse effect of barbiturates, subsequent encounterBillable
T42.3X5SAdverse effect of barbiturates, sequelaBillable
T42.3X6Underdosing of barbituratesCategory
T42.3X6AUnderdosing of barbiturates, initial encounterBillable
T42.3X6DUnderdosing of barbiturates, subsequent encounterBillable
T42.3X6SUnderdosing of barbiturates, 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.