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ICD-10-CM · FY 2026 APRIL UPDATE

T45.5

Poisoning by, adverse effect of and underdosing of anticoagulants and 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
T45.51Poisoning by, adverse effect of and underdosing of anticoagulantsCategory
T45.511Poisoning by anticoagulants, accidental (unintentional)Category
T45.511APoisoning by anticoagulants, accidental (unintentional), initial encounterBillable
T45.511DPoisoning by anticoagulants, accidental (unintentional), subsequent encounterBillable
T45.511SPoisoning by anticoagulants, accidental (unintentional), sequelaBillable
T45.512Poisoning by anticoagulants, intentional self-harmCategory
T45.512APoisoning by anticoagulants, intentional self-harm, initial encounterBillable
T45.512DPoisoning by anticoagulants, intentional self-harm, subsequent encounterBillable
T45.512SPoisoning by anticoagulants, intentional self-harm, sequelaBillable
T45.513Poisoning by anticoagulants, assaultCategory
T45.513APoisoning by anticoagulants, assault, initial encounterBillable
T45.513DPoisoning by anticoagulants, assault, subsequent encounterBillable
T45.513SPoisoning by anticoagulants, assault, sequelaBillable
T45.514Poisoning by anticoagulants, undeterminedCategory
T45.514APoisoning by anticoagulants, undetermined, initial encounterBillable
T45.514DPoisoning by anticoagulants, undetermined, subsequent encounterBillable
T45.514SPoisoning by anticoagulants, undetermined, sequelaBillable
T45.515Adverse effect of anticoagulantsCategory
T45.515AAdverse effect of anticoagulants, initial encounterBillable
T45.515DAdverse effect of anticoagulants, subsequent encounterBillable
T45.515SAdverse effect of anticoagulants, sequelaBillable
T45.516Underdosing of anticoagulantsCategory
T45.516AUnderdosing of anticoagulants, initial encounterBillable
T45.516DUnderdosing of anticoagulants, subsequent encounterBillable
T45.516SUnderdosing of anticoagulants, sequelaBillable
T45.52Poisoning by, adverse effect of and underdosing of antithrombotic drugsCategory
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

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.