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ICD-10-CM · FY 2026 APRIL UPDATE

T50.9

Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances

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
T50.90Poisoning by, adverse effect of and underdosing of unspecified drugs, medicaments and biological substancesCategory
T50.901Poisoning by unspecified drugs, medicaments and biological substances, accidental (unintentional)Category
T50.901APoisoning by unspecified drugs, medicaments and biological substances, accidental (unintentional), initial encounterBillable
T50.901DPoisoning by unspecified drugs, medicaments and biological substances, accidental (unintentional), subsequent encounterBillable
T50.901SPoisoning by unspecified drugs, medicaments and biological substances, accidental (unintentional), sequelaBillable
T50.902Poisoning by unspecified drugs, medicaments and biological substances, intentional self-harmCategory
T50.902APoisoning by unspecified drugs, medicaments and biological substances, intentional self-harm, initial encounterBillable
T50.902DPoisoning by unspecified drugs, medicaments and biological substances, intentional self-harm, subsequent encounterBillable
T50.902SPoisoning by unspecified drugs, medicaments and biological substances, intentional self-harm, sequelaBillable
T50.903Poisoning by unspecified drugs, medicaments and biological substances, assaultCategory
T50.903APoisoning by unspecified drugs, medicaments and biological substances, assault, initial encounterBillable
T50.903DPoisoning by unspecified drugs, medicaments and biological substances, assault, subsequent encounterBillable
T50.903SPoisoning by unspecified drugs, medicaments and biological substances, assault, sequelaBillable
T50.904Poisoning by unspecified drugs, medicaments and biological substances, undeterminedCategory
T50.904APoisoning by unspecified drugs, medicaments and biological substances, undetermined, initial encounterBillable
T50.904DPoisoning by unspecified drugs, medicaments and biological substances, undetermined, subsequent encounterBillable
T50.904SPoisoning by unspecified drugs, medicaments and biological substances, undetermined, sequelaBillable
T50.905Adverse effect of unspecified drugs, medicaments and biological substancesCategory
T50.905AAdverse effect of unspecified drugs, medicaments and biological substances, initial encounterBillable
T50.905DAdverse effect of unspecified drugs, medicaments and biological substances, subsequent encounterBillable
T50.905SAdverse effect of unspecified drugs, medicaments and biological substances, sequelaBillable
T50.906Underdosing of unspecified drugs, medicaments and biological substancesCategory
T50.906AUnderdosing of unspecified drugs, medicaments and biological substances, initial encounterBillable
T50.906DUnderdosing of unspecified drugs, medicaments and biological substances, subsequent encounterBillable
T50.906SUnderdosing of unspecified drugs, medicaments and biological substances, sequelaBillable
T50.91Poisoning by, adverse effect of and underdosing of multiple unspecified drugs, medicaments and biological substancesCategory
T50.911Poisoning by multiple unspecified drugs, medicaments and biological substances, accidental (unintentional)Category
T50.911APoisoning by multiple unspecified drugs, medicaments and biological substances, accidental (unintentional), initial encounterBillable
T50.911DPoisoning by multiple unspecified drugs, medicaments and biological substances, accidental (unintentional), subsequent encounterBillable
T50.911SPoisoning by multiple unspecified drugs, medicaments and biological substances, 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.