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ICD-10-CM · FY 2026 APRIL UPDATE

T46.1

Poisoning by, adverse effect of and underdosing of calcium-channel blockers

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
T46.1XPoisoning by, adverse effect of and underdosing of calcium-channel blockersCategory
T46.1X1Poisoning by calcium-channel blockers, accidental (unintentional)Category
T46.1X1APoisoning by calcium-channel blockers, accidental (unintentional), initial encounterBillable
T46.1X1DPoisoning by calcium-channel blockers, accidental (unintentional), subsequent encounterBillable
T46.1X1SPoisoning by calcium-channel blockers, accidental (unintentional), sequelaBillable
T46.1X2Poisoning by calcium-channel blockers, intentional self-harmCategory
T46.1X2APoisoning by calcium-channel blockers, intentional self-harm, initial encounterBillable
T46.1X2DPoisoning by calcium-channel blockers, intentional self-harm, subsequent encounterBillable
T46.1X2SPoisoning by calcium-channel blockers, intentional self-harm, sequelaBillable
T46.1X3Poisoning by calcium-channel blockers, assaultCategory
T46.1X3APoisoning by calcium-channel blockers, assault, initial encounterBillable
T46.1X3DPoisoning by calcium-channel blockers, assault, subsequent encounterBillable
T46.1X3SPoisoning by calcium-channel blockers, assault, sequelaBillable
T46.1X4Poisoning by calcium-channel blockers, undeterminedCategory
T46.1X4APoisoning by calcium-channel blockers, undetermined, initial encounterBillable
T46.1X4DPoisoning by calcium-channel blockers, undetermined, subsequent encounterBillable
T46.1X4SPoisoning by calcium-channel blockers, undetermined, sequelaBillable
T46.1X5Adverse effect of calcium-channel blockersCategory
T46.1X5AAdverse effect of calcium-channel blockers, initial encounterBillable
T46.1X5DAdverse effect of calcium-channel blockers, subsequent encounterBillable
T46.1X5SAdverse effect of calcium-channel blockers, sequelaBillable
T46.1X6Underdosing of calcium-channel blockersCategory
T46.1X6AUnderdosing of calcium-channel blockers, initial encounterBillable
T46.1X6DUnderdosing of calcium-channel blockers, subsequent encounterBillable
T46.1X6SUnderdosing of calcium-channel blockers, 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.