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ICD-10-CM · FY 2026 APRIL UPDATE

T45

Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified

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
T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugsCategory
T45.0XPoisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugsCategory
T45.0X1Poisoning by antiallergic and antiemetic drugs, accidental (unintentional)Category
T45.0X1APoisoning by antiallergic and antiemetic drugs, accidental (unintentional), initial encounterBillable
T45.0X1DPoisoning by antiallergic and antiemetic drugs, accidental (unintentional), subsequent encounterBillable
T45.0X1SPoisoning by antiallergic and antiemetic drugs, accidental (unintentional), sequelaBillable
T45.0X2Poisoning by antiallergic and antiemetic drugs, intentional self-harmCategory
T45.0X2APoisoning by antiallergic and antiemetic drugs, intentional self-harm, initial encounterBillable
T45.0X2DPoisoning by antiallergic and antiemetic drugs, intentional self-harm, subsequent encounterBillable
T45.0X2SPoisoning by antiallergic and antiemetic drugs, intentional self-harm, sequelaBillable
T45.0X3Poisoning by antiallergic and antiemetic drugs, assaultCategory
T45.0X3APoisoning by antiallergic and antiemetic drugs, assault, initial encounterBillable
T45.0X3DPoisoning by antiallergic and antiemetic drugs, assault, subsequent encounterBillable
T45.0X3SPoisoning by antiallergic and antiemetic drugs, assault, sequelaBillable
T45.0X4Poisoning by antiallergic and antiemetic drugs, undeterminedCategory
T45.0X4APoisoning by antiallergic and antiemetic drugs, undetermined, initial encounterBillable
T45.0X4DPoisoning by antiallergic and antiemetic drugs, undetermined, subsequent encounterBillable
T45.0X4SPoisoning by antiallergic and antiemetic drugs, undetermined, sequelaBillable
T45.0X5Adverse effect of antiallergic and antiemetic drugsCategory
T45.0X5AAdverse effect of antiallergic and antiemetic drugs, initial encounterBillable
T45.0X5DAdverse effect of antiallergic and antiemetic drugs, subsequent encounterBillable
T45.0X5SAdverse effect of antiallergic and antiemetic drugs, sequelaBillable
T45.0X6Underdosing of antiallergic and antiemetic drugsCategory
T45.0X6AUnderdosing of antiallergic and antiemetic drugs, initial encounterBillable
T45.0X6DUnderdosing of antiallergic and antiemetic drugs, subsequent encounterBillable
T45.0X6SUnderdosing of antiallergic and antiemetic drugs, sequelaBillable
T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugsCategory
T45.1XPoisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugsCategory
T45.1X1Poisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional)Category
T45.1X1APoisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional), initial encounterBillable

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.