B00.4

Herpesviral encephalitis

Billable / specific

B00.4 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Herpesviral meningoencephalitis
  • Simian B disease

Includes (from B00)

  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here — never report together with this code.

  • herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)
  • non-simplex herpesviral encephalitis (B10.0-)
  • congenital herpesviral infections (P35.2) (from B00)

Excludes2

Not included here — may be reported together when both conditions exist.

  • carrier or suspected carrier of infectious disease (Z22.-) (from B00)
  • certain localized infections - see body system-related chapters (from B00)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) (from B00)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39) (from B00)
  • influenza and other acute respiratory infections (J00-J22) (from B00)
  • anogenital herpesviral infection (A60.-) (from B00)
  • gammaherpesviral mononucleosis (B27.0-) (from B00)
  • herpangina (B08.5) (from B00)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify resistance to antimicrobial drugs (Z16.-) (from B00)

Also known as

  • Herpesviral meningoencephalitis
  • Simian B disease
  • Disease, diseased, simian B
  • Encephalitis, herpesviral
  • Encephalitis, in herpesvirus
  • Herpes, herpesvirus, herpetic, encephalitis
  • Meningoencephalitis, herpesviral, herpetic
  • Meningoencephalitis, in herpes

Parent code

  • B00Herpesviral [herpes simplex] infectionsHeader

Related codes

  • B00.0Eczema herpeticumBillable
  • B00.1Herpesviral vesicular dermatitisBillable
  • B00.2Herpesviral gingivostomatitis and pharyngotonsillitisBillable
  • B00.3Herpesviral meningitisBillable
  • B00.5Herpesviral ocular diseaseHeader
  • B00.7Disseminated herpesviral diseaseBillable
  • B00.8Other forms of herpesviral infectionsHeader
  • B00.9Herpesviral infection, unspecifiedBillable

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