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ICD-10-CM · FY 2026 APRIL UPDATE

T43.20

Poisoning by, adverse effect of and underdosing of unspecified antidepressants

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
T43.201Poisoning by unspecified antidepressants, accidental (unintentional)Category
T43.201APoisoning by unspecified antidepressants, accidental (unintentional), initial encounterBillable
T43.201DPoisoning by unspecified antidepressants, accidental (unintentional), subsequent encounterBillable
T43.201SPoisoning by unspecified antidepressants, accidental (unintentional), sequelaBillable
T43.202Poisoning by unspecified antidepressants, intentional self-harmCategory
T43.202APoisoning by unspecified antidepressants, intentional self-harm, initial encounterBillable
T43.202DPoisoning by unspecified antidepressants, intentional self-harm, subsequent encounterBillable
T43.202SPoisoning by unspecified antidepressants, intentional self-harm, sequelaBillable
T43.203Poisoning by unspecified antidepressants, assaultCategory
T43.203APoisoning by unspecified antidepressants, assault, initial encounterBillable
T43.203DPoisoning by unspecified antidepressants, assault, subsequent encounterBillable
T43.203SPoisoning by unspecified antidepressants, assault, sequelaBillable
T43.204Poisoning by unspecified antidepressants, undeterminedCategory
T43.204APoisoning by unspecified antidepressants, undetermined, initial encounterBillable
T43.204DPoisoning by unspecified antidepressants, undetermined, subsequent encounterBillable
T43.204SPoisoning by unspecified antidepressants, undetermined, sequelaBillable
T43.205Adverse effect of unspecified antidepressantsCategory
T43.205AAdverse effect of unspecified antidepressants, initial encounterBillable
T43.205DAdverse effect of unspecified antidepressants, subsequent encounterBillable
T43.205SAdverse effect of unspecified antidepressants, sequelaBillable
T43.206Underdosing of unspecified antidepressantsCategory
T43.206AUnderdosing of unspecified antidepressants, initial encounterBillable
T43.206DUnderdosing of unspecified antidepressants, subsequent encounterBillable
T43.206SUnderdosing of unspecified antidepressants, 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.