B03 SMALLPOX

Code Information

  • Diagnosis Code: B03
  • Short Description: Smallpox
  • Long Description: Smallpox
  • Code Version: 2025 ICD-10-CM

The code B03 is VALID for claim submission

Code Classification

Synonyms

  • Alastrim
  • Flat-type smallpox
  • Hemorrhagic smallpox
  • Modified smallpox
  • Smallpox
  • Smallpox without rash
  • Variola major

Diagnostic Related Group(s)

The code B03 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

  1. Viral Illness With Mcc (865)
  2. Viral Illness Without Mcc (866)

References to Index of Diseases and Injuries

The code B03 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Notes:
    • In 1980 the 33rd World Health Assembly declared that smallpox had been eradicated.
    • The classification is maintained for surveillance purposes.

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
B03 Right Arrow 050.0 Variola major
050.1 Alastrim
050.9 Smallpox NOS
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
This page was last updated on: 10/1/2025