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ICD-10-CM · FY 2026 APRIL UPDATE

T43.1

Poisoning by, adverse effect of and underdosing of monoamine-oxidase-inhibitor 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
T43.1XPoisoning by, adverse effect of and underdosing of monoamine-oxidase-inhibitor antidepressantsCategory
T43.1X1Poisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional)Category
T43.1X1APoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), initial encounterBillable
T43.1X1DPoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), subsequent encounterBillable
T43.1X1SPoisoning by monoamine-oxidase-inhibitor antidepressants, accidental (unintentional), sequelaBillable
T43.1X2Poisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harmCategory
T43.1X2APoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, initial encounterBillable
T43.1X2DPoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, subsequent encounterBillable
T43.1X2SPoisoning by monoamine-oxidase-inhibitor antidepressants, intentional self-harm, sequelaBillable
T43.1X3Poisoning by monoamine-oxidase-inhibitor antidepressants, assaultCategory
T43.1X3APoisoning by monoamine-oxidase-inhibitor antidepressants, assault, initial encounterBillable
T43.1X3DPoisoning by monoamine-oxidase-inhibitor antidepressants, assault, subsequent encounterBillable
T43.1X3SPoisoning by monoamine-oxidase-inhibitor antidepressants, assault, sequelaBillable
T43.1X4Poisoning by monoamine-oxidase-inhibitor antidepressants, undeterminedCategory
T43.1X4APoisoning by monoamine-oxidase-inhibitor antidepressants, undetermined, initial encounterBillable
T43.1X4DPoisoning by monoamine-oxidase-inhibitor antidepressants, undetermined, subsequent encounterBillable
T43.1X4SPoisoning by monoamine-oxidase-inhibitor antidepressants, undetermined, sequelaBillable
T43.1X5Adverse effect of monoamine-oxidase-inhibitor antidepressantsCategory
T43.1X5AAdverse effect of monoamine-oxidase-inhibitor antidepressants, initial encounterBillable
T43.1X5DAdverse effect of monoamine-oxidase-inhibitor antidepressants, subsequent encounterBillable
T43.1X5SAdverse effect of monoamine-oxidase-inhibitor antidepressants, sequelaBillable
T43.1X6Underdosing of monoamine-oxidase-inhibitor antidepressantsCategory
T43.1X6AUnderdosing of monoamine-oxidase-inhibitor antidepressants, initial encounterBillable
T43.1X6DUnderdosing of monoamine-oxidase-inhibitor antidepressants, subsequent encounterBillable
T43.1X6SUnderdosing of monoamine-oxidase-inhibitor 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.