B01.11 – Varicella encephalitis and encephalomyelitis

ICD-10-CM 2027 diagnosis code · Viral infections characterized by skin and mucous membrane lesions

Billable code

ICD-10-CM code B01.11

Code: B01.11 (claims format: B0111)
Description: Varicella encephalitis and encephalomyelitis
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
Parent codes: B01 › B01.1

Notes for B01.11

Applicable to:

Postchickenpox encephalitis and encephalomyelitis

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

B01.1 – Varicella encephalitis, myelitis and encephalomyelitis

Applicable to:

Postchickenpox encephalitis, myelitis and encephalomyelitis

Index terms for B01.11

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in B01.1

B01.12 – Varicella myelitisBillable

Frequently asked questions

What is ICD-10 code B01.11?

B01.11 is the ICD-10-CM code for varicella encephalitis and encephalomyelitis, in the block B00-B09 (Viral infections characterized by skin and mucous membrane lesions).

Is B01.11 a billable code?

Yes. B01.11 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does B01.11 belong to?

It belongs to category B01 – Varicella [chickenpox].

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.