B03 Smallpox

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Notes

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

Applies from B03 Smallpox

Notes

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

MS-DRG index

Defines the logic of DRG(s) 865-866 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 050.0 Variola major (approximate)
• 050.1 Alastrim (approximate)
• 050.9 Smallpox, unspecified (approximate)

Code annotations containing back-references to B03

Back-references to B03

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Back-references to B03

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B03

• Alastrim
• Smallpox
• Variola (major) (minor)
• Varioloid

Nearby codes

• B03 Smallpox (this code)