A81.1

ICD-10Billable

Subacute sclerosing panencephalitis

Official ICD-10-CM descriptor (FY2026)

Subacute sclerosing panencephalitis

A81.1 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Dawson's inclusion body encephalitis
Van Bogaert's sclerosing leukoencephalopathy

Related codes in A81

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: A81

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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.