ICD-10-CM B01: Varicella [chickenpox]

ICD-10-CM Diagnosis Code (2025)

Official Description for B01

Varicella [chickenpox]

Coding Notes & Guidelines for B01

Inclusion Terms

Postchickenpox encephalitis, myelitis and encephalomyelitis

Inclusion Terms

Postchickenpox encephalitis and encephalomyelitis

Inclusion Terms

Postchickenpox myelitis

Inclusion Terms

Varicella NOS

Child Codes (More Specific Codes for B01):

B01.0 - Varicella meningitis B01.1 - Varicella encephalitis, myelitis and encephalomyelitis B01.11 - Varicella encephalitis and encephalomyelitis B01.12 - Varicella myelitis B01.2 - Varicella pneumonia B01.8 - Varicella with other complications B01.81 - Varicella keratitis B01.89 - Other varicella complications B01.9 - Varicella without complication

About ICD-10-CM Code B01 (Varicella [chickenpox])

ICD-10-CM code B01 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM B01 became effective on October 1, 2024.

This page provides detailed information about B01 - Varicella [chickenpox]. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Varicella [chickenpox].