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ICD-10-CM · FY 2026 APRIL UPDATE

T50.B

Poisoning by, adverse effect of and underdosing of viral vaccines

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.B1Poisoning by, adverse effect of and underdosing of smallpox vaccinesCategory
T50.B11Poisoning by smallpox vaccines, accidental (unintentional)Category
T50.B11APoisoning by smallpox vaccines, accidental (unintentional), initial encounterBillable
T50.B11DPoisoning by smallpox vaccines, accidental (unintentional), subsequent encounterBillable
T50.B11SPoisoning by smallpox vaccines, accidental (unintentional), sequelaBillable
T50.B12Poisoning by smallpox vaccines, intentional self-harmCategory
T50.B12APoisoning by smallpox vaccines, intentional self-harm, initial encounterBillable
T50.B12DPoisoning by smallpox vaccines, intentional self-harm, subsequent encounterBillable
T50.B12SPoisoning by smallpox vaccines, intentional self-harm, sequelaBillable
T50.B13Poisoning by smallpox vaccines, assaultCategory
T50.B13APoisoning by smallpox vaccines, assault, initial encounterBillable
T50.B13DPoisoning by smallpox vaccines, assault, subsequent encounterBillable
T50.B13SPoisoning by smallpox vaccines, assault, sequelaBillable
T50.B14Poisoning by smallpox vaccines, undeterminedCategory
T50.B14APoisoning by smallpox vaccines, undetermined, initial encounterBillable
T50.B14DPoisoning by smallpox vaccines, undetermined, subsequent encounterBillable
T50.B14SPoisoning by smallpox vaccines, undetermined, sequelaBillable
T50.B15Adverse effect of smallpox vaccinesCategory
T50.B15AAdverse effect of smallpox vaccines, initial encounterBillable
T50.B15DAdverse effect of smallpox vaccines, subsequent encounterBillable
T50.B15SAdverse effect of smallpox vaccines, sequelaBillable
T50.B16Underdosing of smallpox vaccinesCategory
T50.B16AUnderdosing of smallpox vaccines, initial encounterBillable
T50.B16DUnderdosing of smallpox vaccines, subsequent encounterBillable
T50.B16SUnderdosing of smallpox vaccines, sequelaBillable
T50.B9Poisoning by, adverse effect of and underdosing of other viral vaccinesCategory
T50.B91Poisoning by other viral vaccines, accidental (unintentional)Category
T50.B91APoisoning by other viral vaccines, accidental (unintentional), initial encounterBillable
T50.B91DPoisoning by other viral vaccines, accidental (unintentional), subsequent encounterBillable
T50.B91SPoisoning by other viral vaccines, 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.