B04 – Monkeypox
ICD-10-CM 2027 diagnosis code · Viral infections characterized by skin and mucous membrane lesions
ICD-10-CM code
B04
- Code
B04(claims format:B04)- Description
- Monkeypox
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B00-B09 Viral infections characterized by skin and mucous membrane lesions
Notes for B04
Applicable to:
- Mpox
Index terms for B04
Entries in the ICD-10-CM alphabetic index that lead to this code:
Frequently asked questions
What is ICD-10 code B04?
B04 is the ICD-10-CM code for monkeypox, in the block B00-B09 (Viral infections characterized by skin and mucous membrane lesions).
Is B04 a billable code?
Yes. B04 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.