A81.1 ICD-10-CM Code: Subacute sclerosing panencephalitis
A81.1 is the billable ICD-10-CM code for “Subacute sclerosing panencephalitis” in the FY 2027 U.S. code set, effective Oct 1, 2026.
Official description
A81.1Subacute sclerosing panencephalitis
ICD-10-CM diagnosis code · United States clinical modification
Where A81.1 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Viral and prion infections of the central nervous system (A80-A89)
- 3
Category A81
Atypical virus infections of central nervous system
- 4
Code A81.1
Subacute sclerosing panencephalitis
Notes for this code
Inclusion terms
- Dawson's inclusion body encephalitis
- Van Bogaert's sclerosing leukoencephalopathy
Code first
No “code first” instruction is listed for A81.1.
Use additional code
No “use additional code” instruction is listed for A81.1.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for A81.1.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for A81.1.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code A81.1 mean?
A81.1 is the FY 2027 U.S. ICD-10-CM code for “Subacute sclerosing panencephalitis.”
Is A81.1 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, A81.1 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is A81.1 located in ICD-10-CM?
A81.1 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Viral and prion infections of the central nervous system (A80-A89) (A80–A89), under category A81, Atypical virus infections of central nervous system.
What coding notes are listed for A81.1?
Its listed inclusion terms are Dawson's inclusion body encephalitis; Van Bogaert's sclerosing leukoencephalopathy. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.