ICD-10 Code
International Classification of Diseases, 10th Revision
Oct 21, 2017

See: Encephalitis, myelitis and encephalomyelitis, unspecified

  ICD-10 Code for Encephalitis & encephalomyelitis, unspecified G04.90

G04.90 is a valid1 ICD 10 diagnosis code.

G04.90 is valid for submission for HIPAA-covered transactions.

Chapter 6 Diseases of the nervous system (G00-G99)
Section G00-G09 Inflammatory diseases of the central nervous system (G00-G09)
Category G04 Encephalitis, myelitis and encephalomyelitis

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.
Inclusion Term
  • Ventriculitis (cerebral) NOS
See also ICD 10 code for

Related Terms to “Encephalitis and encephalomyelitis, unspecified”

  • Encephalitis(chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) - G04.90
  • Encephalomyelitis - G04.90See also Encephalitis
  • Hematomyelitis - G04.90
  • Infection, infected, infective(opportunistic) - B99.9
    • brain - G04.90See also Encephalitis
  • Meningoencephalitis - G04.90See also Encephalitis
  • Ventriculitis(cerebral) - G04.90See also Encephalitis
See the 2017 ICD-10-CM Coding Guidelines.

Questions related to G04.90 Encephalitis and encephalomyelitis, unspecified

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.