B04 ICD-10-CM Code: Monkeypox
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B04Monkeypox
ICD-10-CM diagnosis code · United States clinical modification
Where B04 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Viral infections characterized by skin and mucous membrane lesions (B00-B09)
- 3
Category B04
Monkeypox
- 4
Code B04
Monkeypox
Notes for this code
Inclusion terms
- Mpox
Code first
No “code first” instruction is listed for B04.
Use additional code
No “use additional code” instruction is listed for B04.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for B04.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B04.
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 B04 mean?
B04 is the FY 2027 U.S. ICD-10-CM code for “Monkeypox.”
Is B04 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, B04 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is B04 located in ICD-10-CM?
B04 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Viral infections characterized by skin and mucous membrane lesions (B00-B09) (B00–B09), under category B04, Monkeypox.
What coding notes are listed for B04?
Its listed inclusion terms are Mpox. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.