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ICD-10-CM · FY 2026 APRIL UPDATE

T43.5

Poisoning by, adverse effect of and underdosing of other and unspecified antipsychotics and neuroleptics

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
T43.50Poisoning by, adverse effect of and underdosing of unspecified antipsychotics and neurolepticsCategory
T43.501Poisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional)Category
T43.501APoisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional), initial encounterBillable
T43.501DPoisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional), subsequent encounterBillable
T43.501SPoisoning by unspecified antipsychotics and neuroleptics, accidental (unintentional), sequelaBillable
T43.502Poisoning by unspecified antipsychotics and neuroleptics, intentional self-harmCategory
T43.502APoisoning by unspecified antipsychotics and neuroleptics, intentional self-harm, initial encounterBillable
T43.502DPoisoning by unspecified antipsychotics and neuroleptics, intentional self-harm, subsequent encounterBillable
T43.502SPoisoning by unspecified antipsychotics and neuroleptics, intentional self-harm, sequelaBillable
T43.503Poisoning by unspecified antipsychotics and neuroleptics, assaultCategory
T43.503APoisoning by unspecified antipsychotics and neuroleptics, assault, initial encounterBillable
T43.503DPoisoning by unspecified antipsychotics and neuroleptics, assault, subsequent encounterBillable
T43.503SPoisoning by unspecified antipsychotics and neuroleptics, assault, sequelaBillable
T43.504Poisoning by unspecified antipsychotics and neuroleptics, undeterminedCategory
T43.504APoisoning by unspecified antipsychotics and neuroleptics, undetermined, initial encounterBillable
T43.504DPoisoning by unspecified antipsychotics and neuroleptics, undetermined, subsequent encounterBillable
T43.504SPoisoning by unspecified antipsychotics and neuroleptics, undetermined, sequelaBillable
T43.505Adverse effect of unspecified antipsychotics and neurolepticsCategory
T43.505AAdverse effect of unspecified antipsychotics and neuroleptics, initial encounterBillable
T43.505DAdverse effect of unspecified antipsychotics and neuroleptics, subsequent encounterBillable
T43.505SAdverse effect of unspecified antipsychotics and neuroleptics, sequelaBillable
T43.506Underdosing of unspecified antipsychotics and neurolepticsCategory
T43.506AUnderdosing of unspecified antipsychotics and neuroleptics, initial encounterBillable
T43.506DUnderdosing of unspecified antipsychotics and neuroleptics, subsequent encounterBillable
T43.506SUnderdosing of unspecified antipsychotics and neuroleptics, sequelaBillable
T43.59Poisoning by, adverse effect of and underdosing of other antipsychotics and neurolepticsCategory
T43.591Poisoning by other antipsychotics and neuroleptics, accidental (unintentional)Category
T43.591APoisoning by other antipsychotics and neuroleptics, accidental (unintentional), initial encounterBillable
T43.591DPoisoning by other antipsychotics and neuroleptics, accidental (unintentional), subsequent encounterBillable
T43.591SPoisoning by other antipsychotics and neuroleptics, accidental (unintentional), 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.