Other disorders of brain in diseases classified elsewhere G94- >

Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying disease
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G94. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • encephalopathy in congenital syphilis (
    ICD-10-CM Diagnosis Code A50.49

    Other late congenital neurosyphilis

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Juvenile tabes dorsalis
    A50.49
    )
  • encephalopathy in influenza (
    ICD-10-CM Diagnosis Code J09.X9

    Influenza due to identified novel influenza A virus with other manifestations

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Influenza due to identified novel influenza A virus with encephalopathy
    • Influenza due to identified novel influenza A virus with myocarditis
    • Influenza due to identified novel influenza A virus with otitis media
    Use Additional
    • code to identify manifestation
    J09.X9
    ,
    ICD-10-CM Diagnosis Code J10.81

    Influenza due to other identified influenza virus with encephalopathy

      2016 2017 2018 Billable/Specific Code
    J10.81
    ,
    ICD-10-CM Diagnosis Code J11.81

    Influenza due to unidentified influenza virus with encephalopathy

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Influenzal encephalopathy NOS
    J11.81
    )
  • encephalopathy in syphilis (
    ICD-10-CM Diagnosis Code A52.19

    Other symptomatic neurosyphilis

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Syphilitic parkinsonism
    A52.19
    )
  • hydrocephalus in diseases classified elsewhere (
    ICD-10-CM Diagnosis Code G91.4

    Hydrocephalus in diseases classified elsewhere

      2016 2017 2018 Billable/Specific Code Manifestation Code
    Code First
    • underlying condition, such as:
    • congenital syphilis (A50.4-)
    • neoplasm (C00-D49)
    Type 1 Excludes
    • hydrocephalus due to congenital toxoplasmosis (P37.1)
    G91.4
    )
Codes