A85.8

ICD-10Billable

Other specified viral encephalitis

Official ICD-10-CM descriptor (FY2026)

Other specified viral encephalitis

A85.8 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Encephalitis lethargica
Von Economo-Cruchet disease

Related codes in A85

Where this code sits

Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: Viral and prion infections of the central nervous system (A80-A89)
Parent code: A85

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.