B10.09 Other human herpesvirus encephalitis

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applicable to

• Human herpesvirus 7 encephalitis

Applies from B10 Other human herpesviruses

Excludes2 (not included here)

• cytomegalovirus (B25.9)
• Epstein-Barr virus (B27.0-)
• herpes NOS (B00.9)
• herpes simplex (B00.-)
• herpes zoster (B02.-)
• human herpesvirus NOS (B00.-)
• human herpesvirus 1 and 2 (B00.-)
• human herpesvirus 3 (B01.-, B02.-)
• human herpesvirus 4 (B27.0-)
• human herpesvirus 5 (B25.-)
• varicella (B01.-)
• zoster (B02.-)

Applies from B10.0 Other human herpesvirus encephalitis

Excludes2 (not included here)

• herpes encephalitis NOS (B00.4)
• herpes simplex encephalitis (B00.4)
• human herpesvirus encephalitis (B00.4)
• simian B herpes virus encephalitis (B00.4)

MS-DRG index

Defines the logic of DRG(s) 023-024 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 058.29 Other human herpesvirus encephalitis

Code annotations containing back-references to B10.09

Back-references to B10.09

• Type 1 Excludes: B00.4 Herpesviral encephalitis ("herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)")

Back-references to B10.0

• Type 1 Excludes: A85 Other viral encephalitis, not elsewhere classified ("encephalitis due to herpesvirus NEC (B10.0-)")
• Type 1 Excludes: B00.4 Herpesviral encephalitis ("non-simplex herpesviral encephalitis (B10.0-)")

Back-references to B10

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B10.09

• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › herpesviral › due to herpesvirus 7
• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › herpesviral › specified NEC
• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › in (due to) › herpes (simplex) virus › due to herpesvirus 7
• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › in (due to) › herpes (simplex) virus › specified NEC
• Herpes, herpesvirus, herpetic › encephalitis › due to herpesvirus 7
• Herpes, herpesvirus, herpetic › encephalitis › specified NEC
• Herpes, herpesvirus, herpetic › human › 7 › encephalitis
• Meningoencephalitis › herpesviral, herpetic › due to herpesvirus 7
• Meningoencephalitis › herpesviral, herpetic › specified NEC
• Meningoencephalitis › in (due to) › herpes › due to herpesvirus 7
• Meningoencephalitis › in (due to) › herpes › specified NEC

Nearby codes

• B10 Other human herpesviruses
• B10.0 Other human herpesvirus encephalitis
• B10.01 Human herpesvirus 6 encephalitis
• B10.09 Other human herpesvirus encephalitis (this code)
• B10.8 Other human herpesvirus infection
• B10.81 Human herpesvirus 6 infection
• B10.82 Human herpesvirus 7 infection
• B10.89 Other human herpesvirus infection