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ICD-10-CM · FY 2026 APRIL UPDATE

T46.4

Poisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitors

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
T46.4XPoisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitorsCategory
T46.4X1Poisoning by angiotensin-converting-enzyme inhibitors, accidental (unintentional)Category
T46.4X1APoisoning by angiotensin-converting-enzyme inhibitors, accidental (unintentional), initial encounterBillable
T46.4X1DPoisoning by angiotensin-converting-enzyme inhibitors, accidental (unintentional), subsequent encounterBillable
T46.4X1SPoisoning by angiotensin-converting-enzyme inhibitors, accidental (unintentional), sequelaBillable
T46.4X2Poisoning by angiotensin-converting-enzyme inhibitors, intentional self-harmCategory
T46.4X2APoisoning by angiotensin-converting-enzyme inhibitors, intentional self-harm, initial encounterBillable
T46.4X2DPoisoning by angiotensin-converting-enzyme inhibitors, intentional self-harm, subsequent encounterBillable
T46.4X2SPoisoning by angiotensin-converting-enzyme inhibitors, intentional self-harm, sequelaBillable
T46.4X3Poisoning by angiotensin-converting-enzyme inhibitors, assaultCategory
T46.4X3APoisoning by angiotensin-converting-enzyme inhibitors, assault, initial encounterBillable
T46.4X3DPoisoning by angiotensin-converting-enzyme inhibitors, assault, subsequent encounterBillable
T46.4X3SPoisoning by angiotensin-converting-enzyme inhibitors, assault, sequelaBillable
T46.4X4Poisoning by angiotensin-converting-enzyme inhibitors, undeterminedCategory
T46.4X4APoisoning by angiotensin-converting-enzyme inhibitors, undetermined, initial encounterBillable
T46.4X4DPoisoning by angiotensin-converting-enzyme inhibitors, undetermined, subsequent encounterBillable
T46.4X4SPoisoning by angiotensin-converting-enzyme inhibitors, undetermined, sequelaBillable
T46.4X5Adverse effect of angiotensin-converting-enzyme inhibitorsCategory
T46.4X5AAdverse effect of angiotensin-converting-enzyme inhibitors, initial encounterBillable
T46.4X5DAdverse effect of angiotensin-converting-enzyme inhibitors, subsequent encounterBillable
T46.4X5SAdverse effect of angiotensin-converting-enzyme inhibitors, sequelaBillable
T46.4X6Underdosing of angiotensin-converting-enzyme inhibitorsCategory
T46.4X6AUnderdosing of angiotensin-converting-enzyme inhibitors, initial encounterBillable
T46.4X6DUnderdosing of angiotensin-converting-enzyme inhibitors, subsequent encounterBillable
T46.4X6SUnderdosing of angiotensin-converting-enzyme inhibitors, 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.