B34 Viral infection of unspecified site

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Viral infection of unspecified site is B34 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
B25-B34: Other viral diseases (B25-B34)
Category B34
8 codes (7 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with B34.
  • anogenital human papillomavirus infection (A63.0)
  • cytomegaloviral disease NOS (B25.9)
  • herpesvirus [herpes simplex] infection NOS (B00.9)
  • retrovirus infection NOS (B33.3)
  • viral agents as the cause of diseases classified elsewhere (B97.-)
  • viral warts due to human papillomavirus infection (B07)

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.a
Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

B34.0 Adenovirus infection, unspecified B34.1 Enterovirus infection, unspecified B34.2 Coronavirus infection, unspecified B34.3 Parvovirus infection, unspecified B34.4 Papovavirus infection, unspecified B34.8 Other viral infections of unspecified site B34.9 Viral infection, unspecified

Related Codes in B34

B34.0 Adenovirus infection, unspecified B34.1 Enterovirus infection, unspecified B34.2 Coronavirus infection, unspecified B34.3 Parvovirus infection, unspecified B34.4 Papovavirus infection, unspecified B34.8 Other viral infections of unspecified site B34.9 Viral infection, unspecified
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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