Is B03 a billable ICD-10 code?

Yes. B03 (Smallpox) is billable and can be used for insurance claims. Always verify payer-specific requirements.

B03 ✓ Billable

Smallpox

Q: What is ICD-10 code B03?

ICD-10-CM code B03 stands for "Smallpox". It is a billable code in the Certain Infectious and Parasitic Diseases chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases

Code

B03

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Certain Infectious and Parasitic Diseases

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code B03?

ICD-10-CM code B03 represents Smallpox. It is a billable diagnosis code in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.

Is B03 billable?

Yes. B03 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is B03 in?

B03 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.

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