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U.S. ICD-10-CM · FY 2027

T50.B16S ICD-10-CM Code: Underdosing of smallpox vaccines, sequela

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

T50.B16S

Underdosing of smallpox vaccines, sequela

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where T50.B16S sits

  1. 1

    Chapter 19

    Injury, poisoning and certain other consequences of external causes (S00-T88)

  2. 2

    Section

    Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)

  3. 3

    Category T50

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

  4. 4

    Subcategory T50.B16

    Underdosing of smallpox vaccines

  5. 5

    Code T50.B16S

    Underdosing of smallpox vaccines, sequela

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for T50.B16S.

Code first

No “code first” instruction is listed for T50.B16S.

Use additional code

No “use additional code” instruction is listed for T50.B16S.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for T50.B16S.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for T50.B16S.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code T50.B16S mean?

T50.B16S is the FY 2027 U.S. ICD-10-CM code for “Underdosing of smallpox vaccines, sequela.”

Is T50.B16S a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, T50.B16S has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is T50.B16S located in ICD-10-CM?

T50.B16S is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (T36–T50), under category T50, Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances and subcategory T50.B16, Underdosing of smallpox vaccines.

What coding notes are listed for T50.B16S?

No inclusion terms are listed for T50.B16S in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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