ICD-10-CM B33: Other viral diseases, not elsewhere classified

ICD-10-CM Diagnosis Code (2025)

Official Description for B33

Other viral diseases, not elsewhere classified

Coding Notes & Guidelines for B33

Excludes1: Not Coded Here
  • hantavirus disease with renal manifestations (A98.5)
  • hemorrhagic fever with renal manifestations (A98.5)
Excludes1: Not Coded Here
  • anogenital human papillomavirus infection (A63.0)
  • viral warts due to human papillomavirus infection (B07)
Use Additional Code

code to identify any associated acute kidney failure (N17.9)

Inclusion Terms

Bornholm disease

Inclusion Terms
  • Epidemic polyarthritis and exanthema
  • Ross River fever
Inclusion Terms

Coxsackie (virus) carditis

Inclusion Terms

Retrovirus infection NOS

Inclusion Terms
  • Hantavirus disease with pulmonary manifestations
  • Sin nombre virus disease

Child Codes (More Specific Codes for B33):

B33.0 - Epidemic myalgia B33.1 - Ross River disease B33.2 - Viral carditis B33.20 - Viral carditis, unspecified B33.21 - Viral endocarditis B33.22 - Viral myocarditis B33.23 - Viral pericarditis B33.24 - Viral cardiomyopathy B33.3 - Retrovirus infections, not elsewhere classified B33.4 - Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] B33.8 - Other specified viral diseases

About ICD-10-CM Code B33 (Other viral diseases)

ICD-10-CM code B33 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM B33 became effective on October 1, 2024.

This page provides detailed information about B33 - Other viral diseases, not elsewhere classified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other viral diseases related to not elsewhere classified.