B34 ICD-10-CM Code: Viral infection of unspecified site
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B34Viral infection of unspecified site
ICD-10-CM diagnosis code · United States clinical modification
Where B34 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Other viral diseases (B25-B34)
- 3
Category B34
Viral infection of unspecified site
- 4
Code B34
Viral infection of unspecified site
Codes under B34
B34 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for B34.
Code first
No “code first” instruction is listed for B34.
Use additional code
No “use additional code” instruction is listed for B34.
Excludes1
Conditions that should not be reported together with this code.
- 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)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B34.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code B34 mean?
B34 is the FY 2027 U.S. ICD-10-CM code for “Viral infection of unspecified site.”
Is B34 a billable or specific ICD-10-CM code?
No. B34 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is B34 located in ICD-10-CM?
B34 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other viral diseases (B25-B34) (B25–B34), under category B34, Viral infection of unspecified site.
What coding notes are listed for B34?
No inclusion terms are listed for B34 in this reference record. No code-first instruction is listed. Excludes1 notes: 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). No Excludes2 note is listed.