ICD-10-CM
ICD-10 code for Variola (major) (minor): B03
The ICD-10-CM index points "Variola (major) (minor)" to B03, Smallpox. B03 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
Run it in Rivvi
Check every code on your export
Upload a claims or problem-list export. Rivvi flags codes that are not billable, replaced, or unspecified when a specific code exists.
Check my exportFree to start. Opens Rivvi, the AI workspace for healthcare teams.
Related conditions
Related pages
- B03 code detailsNotes, nearby codes, CMS-HCC group
- Chapter 1Certain infectious and parasitic diseases
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Variola (major) (minor)?
The ICD-10-CM index points "Variola (major) (minor)" to B03, Smallpox. B03 is a billable code.
Is B03 billable?
Yes. B03 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What chapter is B03 in?
Chapter 1. Certain infectious and parasitic diseases.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.