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ICD-10-CM · FY 2026 APRIL UPDATE

T50.Z9

Poisoning by, adverse effect of and underdosing of other vaccines 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.Z91Poisoning by other vaccines and biological substances, accidental (unintentional)Category
T50.Z91APoisoning by other vaccines and biological substances, accidental (unintentional), initial encounterBillable
T50.Z91DPoisoning by other vaccines and biological substances, accidental (unintentional), subsequent encounterBillable
T50.Z91SPoisoning by other vaccines and biological substances, accidental (unintentional), sequelaBillable
T50.Z92Poisoning by other vaccines and biological substances, intentional self-harmCategory
T50.Z92APoisoning by other vaccines and biological substances, intentional self-harm, initial encounterBillable
T50.Z92DPoisoning by other vaccines and biological substances, intentional self-harm, subsequent encounterBillable
T50.Z92SPoisoning by other vaccines and biological substances, intentional self-harm, sequelaBillable
T50.Z93Poisoning by other vaccines and biological substances, assaultCategory
T50.Z93APoisoning by other vaccines and biological substances, assault, initial encounterBillable
T50.Z93DPoisoning by other vaccines and biological substances, assault, subsequent encounterBillable
T50.Z93SPoisoning by other vaccines and biological substances, assault, sequelaBillable
T50.Z94Poisoning by other vaccines and biological substances, undeterminedCategory
T50.Z94APoisoning by other vaccines and biological substances, undetermined, initial encounterBillable
T50.Z94DPoisoning by other vaccines and biological substances, undetermined, subsequent encounterBillable
T50.Z94SPoisoning by other vaccines and biological substances, undetermined, sequelaBillable
T50.Z95Adverse effect of other vaccines and biological substancesCategory
T50.Z95AAdverse effect of other vaccines and biological substances, initial encounterBillable
T50.Z95DAdverse effect of other vaccines and biological substances, subsequent encounterBillable
T50.Z95SAdverse effect of other vaccines and biological substances, sequelaBillable
T50.Z96Underdosing of other vaccines and biological substancesCategory
T50.Z96AUnderdosing of other vaccines and biological substances, initial encounterBillable
T50.Z96DUnderdosing of other vaccines and biological substances, subsequent encounterBillable
T50.Z96SUnderdosing of other vaccines 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.