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ICD-10-CM · FY 2026 APRIL UPDATE

T43.9

Poisoning by, adverse effect of and underdosing of unspecified psychotropic drug

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
T43.91Poisoning by unspecified psychotropic drug, accidental (unintentional)Category
T43.91XAPoisoning by unspecified psychotropic drug, accidental (unintentional), initial encounterBillable
T43.91XDPoisoning by unspecified psychotropic drug, accidental (unintentional), subsequent encounterBillable
T43.91XSPoisoning by unspecified psychotropic drug, accidental (unintentional), sequelaBillable
T43.92Poisoning by unspecified psychotropic drug, intentional self-harmCategory
T43.92XAPoisoning by unspecified psychotropic drug, intentional self-harm, initial encounterBillable
T43.92XDPoisoning by unspecified psychotropic drug, intentional self-harm, subsequent encounterBillable
T43.92XSPoisoning by unspecified psychotropic drug, intentional self-harm, sequelaBillable
T43.93Poisoning by unspecified psychotropic drug, assaultCategory
T43.93XAPoisoning by unspecified psychotropic drug, assault, initial encounterBillable
T43.93XDPoisoning by unspecified psychotropic drug, assault, subsequent encounterBillable
T43.93XSPoisoning by unspecified psychotropic drug, assault, sequelaBillable
T43.94Poisoning by unspecified psychotropic drug, undeterminedCategory
T43.94XAPoisoning by unspecified psychotropic drug, undetermined, initial encounterBillable
T43.94XDPoisoning by unspecified psychotropic drug, undetermined, subsequent encounterBillable
T43.94XSPoisoning by unspecified psychotropic drug, undetermined, sequelaBillable
T43.95Adverse effect of unspecified psychotropic drugCategory
T43.95XAAdverse effect of unspecified psychotropic drug, initial encounterBillable
T43.95XDAdverse effect of unspecified psychotropic drug, subsequent encounterBillable
T43.95XSAdverse effect of unspecified psychotropic drug, sequelaBillable
T43.96Underdosing of unspecified psychotropic drugCategory
T43.96XAUnderdosing of unspecified psychotropic drug, initial encounterBillable
T43.96XDUnderdosing of unspecified psychotropic drug, subsequent encounterBillable
T43.96XSUnderdosing of unspecified psychotropic drug, 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.