B01 ICD-10-CM Code: Varicella [chickenpox]
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B01Varicella [chickenpox]
ICD-10-CM diagnosis code · United States clinical modification
Where B01 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 B01
Varicella [chickenpox]
- 4
Code B01
Varicella [chickenpox]
Codes under B01
B01 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 B01.
Code first
No “code first” instruction is listed for B01.
Use additional code
No “use additional code” instruction is listed for B01.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for B01.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B01.
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 B01 mean?
B01 is the FY 2027 U.S. ICD-10-CM code for “Varicella [chickenpox].”
Is B01 a billable or specific ICD-10-CM code?
No. B01 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 B01 located in ICD-10-CM?
B01 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 B01, Varicella [chickenpox].
What coding notes are listed for B01?
No inclusion terms are listed for B01 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.