Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

T45.52

Poisoning by, adverse effect of and underdosing of antithrombotic drugs

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
T45.521Poisoning by antithrombotic drugs, accidental (unintentional)Category
T45.521APoisoning by antithrombotic drugs, accidental (unintentional), initial encounterBillable
T45.521DPoisoning by antithrombotic drugs, accidental (unintentional), subsequent encounterBillable
T45.521SPoisoning by antithrombotic drugs, accidental (unintentional), sequelaBillable
T45.522Poisoning by antithrombotic drugs, intentional self-harmCategory
T45.522APoisoning by antithrombotic drugs, intentional self-harm, initial encounterBillable
T45.522DPoisoning by antithrombotic drugs, intentional self-harm, subsequent encounterBillable
T45.522SPoisoning by antithrombotic drugs, intentional self-harm, sequelaBillable
T45.523Poisoning by antithrombotic drugs, assaultCategory
T45.523APoisoning by antithrombotic drugs, assault, initial encounterBillable
T45.523DPoisoning by antithrombotic drugs, assault, subsequent encounterBillable
T45.523SPoisoning by antithrombotic drugs, assault, sequelaBillable
T45.524Poisoning by antithrombotic drugs, undeterminedCategory
T45.524APoisoning by antithrombotic drugs, undetermined, initial encounterBillable
T45.524DPoisoning by antithrombotic drugs, undetermined, subsequent encounterBillable
T45.524SPoisoning by antithrombotic drugs, undetermined, sequelaBillable
T45.525Adverse effect of antithrombotic drugsCategory
T45.525AAdverse effect of antithrombotic drugs, initial encounterBillable
T45.525DAdverse effect of antithrombotic drugs, subsequent encounterBillable
T45.525SAdverse effect of antithrombotic drugs, sequelaBillable
T45.526Underdosing of antithrombotic drugsCategory
T45.526AUnderdosing of antithrombotic drugs, initial encounterBillable
T45.526DUnderdosing of antithrombotic drugs, subsequent encounterBillable
T45.526SUnderdosing of antithrombotic drugs, 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.