All ICD10 Codes

B01

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Varicella [chickenpox]

Use a more specific code (3 billable, 2 non-billable)
B01.0Varicella meningitisB01.1Varicella encephalitis, myelitis and encephalomyelitishas subcodesB01.2Varicella pneumoniaB01.8Varicella with other complicationshas subcodesB01.9Varicella without complication
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
B00-B09Viral infections characterized by skin and mucous membrane lesions (B00-B09)
B01Varicella [chickenpox]Not billable
B01.0Varicella meningitisBillable
B01.1Varicella encephalitis, myelitis and encephalomyelitisSubcodes
B01.2Varicella pneumoniaBillable
B01.8Varicella with other complicationsSubcodes
B01.9Varicella without complicationBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B01:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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