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B10.09

Other human herpesvirus encephalitis

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 21 never code together
B10.0code
Excludes2
  • herpes encephalitis NOS (B00.4)B00.4
  • herpes simplex encephalitis (B00.4)B00.4
  • human herpesvirus encephalitis (B00.4)B00.4
  • simian B herpes virus encephalitis (B00.4)B00.4
B10code
Excludes2
  • cytomegalovirus (B25.9)B25.9
  • Epstein-Barr virus (B27.0-)B27.0-
  • herpes NOS (B00.9)B00.9
  • herpes simplex (B00.-)B00.-
  • herpes zoster (B02.-)B02.-
  • human herpesvirus NOS (B00.-)B00.-
  • human herpesvirus 1 and 2 (B00.-)B00.-
  • human herpesvirus 3 (B01.-, B02.-)B01.-B02.-
  • human herpesvirus 4 (B27.0-)B27.0-
  • human herpesvirus 5 (B25.-)B25.-
  • varicella (B01.-)B01.-
  • zoster (B02.-)B02.-
A00-B99chapter
Excludes1
  • certain localized infections - see body system-related chapters
Excludes2
  • carrier or suspected carrier of infectious disease (Z22.-)Z22.-
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
  • influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 3
B10.09code
Inclusion terms
  • Human herpesvirus 7 encephalitis
A00-B99chapter
Includes
  • diseases generally recognized as communicable or transmissible
Use additional code
  • code to identify resistance to antimicrobial drugs (Z16.-)Z16.-
Index entries leading here 3
  • Herpes, herpesvirus, herpetic B00.9
  • Meningoencephalitis G04.90
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
Alongside this code 1 same parent — B10.0
B10.01 Human herpesvirus 6 encephalitis
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
B10.0
Siblings
1

Present FY2024–FY2027.