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ICD-10-CM · FY 2026 APRIL UPDATE

T50.91

Poisoning by, adverse effect of and underdosing of multiple 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
T50.911Poisoning 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
T50.912Poisoning by multiple unspecified drugs, medicaments and biological substances, intentional self-harmCategory
T50.912APoisoning by multiple unspecified drugs, medicaments and biological substances, intentional self-harm, initial encounterBillable
T50.912DPoisoning by multiple unspecified drugs, medicaments and biological substances, intentional self-harm, subsequent encounterBillable
T50.912SPoisoning by multiple unspecified drugs, medicaments and biological substances, intentional self-harm, sequelaBillable
T50.913Poisoning by multiple unspecified drugs, medicaments and biological substances, assaultCategory
T50.913APoisoning by multiple unspecified drugs, medicaments and biological substances, assault, initial encounterBillable
T50.913DPoisoning by multiple unspecified drugs, medicaments and biological substances, assault, subsequent encounterBillable
T50.913SPoisoning by multiple unspecified drugs, medicaments and biological substances, assault, sequelaBillable
T50.914Poisoning by multiple unspecified drugs, medicaments and biological substances, undeterminedCategory
T50.914APoisoning by multiple unspecified drugs, medicaments and biological substances, undetermined, initial encounterBillable
T50.914DPoisoning by multiple unspecified drugs, medicaments and biological substances, undetermined, subsequent encounterBillable
T50.914SPoisoning by multiple unspecified drugs, medicaments and biological substances, undetermined, sequelaBillable
T50.915Adverse effect of multiple unspecified drugs, medicaments and biological substancesCategory
T50.915AAdverse effect of multiple unspecified drugs, medicaments and biological substances, initial encounterBillable
T50.915DAdverse effect of multiple unspecified drugs, medicaments and biological substances, subsequent encounterBillable
T50.915SAdverse effect of multiple unspecified drugs, medicaments and biological substances, sequelaBillable
T50.916Underdosing of multiple unspecified drugs, medicaments and biological substancesCategory
T50.916AUnderdosing of multiple unspecified drugs, medicaments and biological substances, initial encounterBillable
T50.916DUnderdosing of multiple unspecified drugs, medicaments and biological substances, subsequent encounterBillable
T50.916SUnderdosing of multiple unspecified drugs, medicaments and biological substances, 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.