All ICD10 Codes

B01.1

Non-Billable
ChapterA00–B99
Ranksubcategory
Official Description

Varicella encephalitis, myelitis and encephalomyelitis

Use a more specific code (2 billable)
B01.11Varicella encephalitis and encephalomyelitisB01.12Varicella myelitis
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

Instructional Notes

Includes
  • Postchickenpox encephalitis, myelitis and encephalomyelitis
General instructions are available for the parent sections:
View CH1 Notes

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]
B01.1Varicella encephalitis, myelitis and encephalomyelitisNot billable
B01.11Varicella encephalitis and encephalomyelitisBillable
B01.12Varicella myelitisBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B01.1:

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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