ICD-10-CM diagnosis code
T50.B95D Adverse effect of other viral vaccines, subsequent encounter
- Billable
- Yes, a complete code (FY2026)
Encounter (7th character)
This code is for a subsequent encounter: active treatment is complete and the patient is being seen during healing or recovery (for example a cast change, medication adjustment or follow-up visit).
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Other codes in T50
342 complete codes in this category.
- T50.B93DPoisoning by other viral vaccines, assault, subsequent encounter
- T50.B93SPoisoning by other viral vaccines, assault, sequela
- T50.B94APoisoning by other viral vaccines, undetermined, initial encounter
- T50.B94DPoisoning by other viral vaccines, undetermined, subsequent encounter
- T50.B94SPoisoning by other viral vaccines, undetermined, sequela
- T50.B95AAdverse effect of other viral vaccines, initial encounter
- T50.B95DAdverse effect of other viral vaccines, subsequent encounter
- T50.B95SAdverse effect of other viral vaccines, sequela
- T50.B96AUnderdosing of other viral vaccines, initial encounter
- T50.B96DUnderdosing of other viral vaccines, subsequent encounter
- T50.B96SUnderdosing of other viral vaccines, sequela
- T50.Z11APoisoning by immunoglobulin, accidental (unintentional), initial encounter
Documentation tips
- Make sure the note supports every element of the title, “Adverse effect of other viral vaccines, subsequent encounter”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to T50.
The international WHO ICD-10 also has T50, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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