B01.11
✓ Billable
Varicella encephalitis and encephalomyelitis
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
B01.11
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code B01.11?
ICD-10-CM code B01.11 represents Varicella encephalitis and encephalomyelitis. It is a billable diagnosis code in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is B01.11 billable?
Yes. B01.11 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is B01.11 in?
B01.11 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the B01 category
B01
Varicella [chickenpox]
Non-billable
B01.0
Varicella meningitis
Billable
B01.1
Varicella encephalitis, myelitis and encephalomyelitis
Non-billable
B01.2
Varicella pneumonia
Billable
B01.8
Varicella with other complications
Non-billable
B01.9
Varicella without complication
Billable
B01.12
Varicella myelitis
Billable
B01.81
Varicella keratitis
Billable
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