2021 ICD-10-CM Diagnosis Code G09

Sequelae of inflammatory diseases of central nervous system

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • G09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM G09 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G09 - other international versions of ICD-10 G09 may differ.
Note
  • Category
    ICD-10-CM Diagnosis Code G09

    Sequelae of inflammatory diseases of central nervous system

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Code First
    • condition resulting from (sequela) of inflammatory diseases of central nervous system
    Note
    • Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals.
    G09
    is to be used to indicate conditions whose primary classification is to
    ICD-10-CM Diagnosis Code G00

    Bacterial meningitis, not elsewhere classified

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • bacterial arachnoiditis
    • bacterial leptomeningitis
    • bacterial meningitis
    • bacterial pachymeningitis
    Type 1 Excludes
    • bacterial meningoencephalitis (G04.2)
    • bacterial meningomyelitis (G04.2)
    G00
    -
    ICD-10-CM Diagnosis Code G08

    Intracranial and intraspinal phlebitis and thrombophlebitis

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Septic embolism of intracranial or intraspinal venous sinuses and veins
    • Septic endophlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic phlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic thrombophlebitis of intracranial or intraspinal venous sinuses and veins
    • Septic thrombosis of intracranial or intraspinal venous sinuses and veins
    Type 1 Excludes
    • intracranial phlebitis and thrombophlebitis complicating:
    • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
    • pregnancy, childbirth and the puerperium (O22.5, O87.3)
    • nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6)
    Type 2 Excludes
    • intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
    G08
    as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals.
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.
  • condition resulting from (sequela) of inflammatory diseases of central nervous system
The following code(s) above G09 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G09:
  • G00-G99
    2021 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
Approximate Synonyms
  • Late effect of central nervous system (cns) abscess
  • Late effect of infectious brain abscess
  • Late effect of infectious meningitis
  • Late effects of intracranial abscess
  • Late effects of pyogenic intracranial abscess
  • Sequela of infectious meningitis
ICD-10-CM G09 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 091 Other disorders of nervous system with mcc
  • 092 Other disorders of nervous system with cc
  • 093 Other disorders of nervous system without cc/mcc

Convert G09 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to G09:
  • Note: G09
    ICD-10-CM Diagnosis Code G09

    Sequelae of inflammatory diseases of central nervous system

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Code First
    • condition resulting from (sequela) of inflammatory diseases of central nervous system
    Note
    • Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals.

Diagnosis Index entries containing back-references to G09:
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
    ICD-10-CM Diagnosis Code L02.91

    Cutaneous abscess, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • cerebellum, cerebellar G06.0
      ICD-10-CM Diagnosis Code G06.0

      Intracranial abscess and granuloma

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Brain [any part] abscess (embolic)
      • Cerebellar abscess (embolic)
      • Cerebral abscess (embolic)
      • Intracranial epidural abscess or granuloma
      • Intracranial extradural abscess or granuloma
      • Intracranial subdural abscess or granuloma
      • Otogenic abscess (embolic)
      Type 1 Excludes
      • tuberculous intracranial abscess and granuloma (A17.81)
      • sequelae G09
    • cerebral (embolic) G06.0
      ICD-10-CM Diagnosis Code G06.0

      Intracranial abscess and granuloma

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Brain [any part] abscess (embolic)
      • Cerebellar abscess (embolic)
      • Cerebral abscess (embolic)
      • Intracranial epidural abscess or granuloma
      • Intracranial extradural abscess or granuloma
      • Intracranial subdural abscess or granuloma
      • Otogenic abscess (embolic)
      Type 1 Excludes
      • tuberculous intracranial abscess and granuloma (A17.81)
      • sequelae G09
    • extradural G06.2
      ICD-10-CM Diagnosis Code G06.2

      Extradural and subdural abscess, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • brain G06.0
        ICD-10-CM Diagnosis Code G06.0

        Intracranial abscess and granuloma

          2016 2017 2018 2019 2020 2021 Billable/Specific Code
        Applicable To
        • Brain [any part] abscess (embolic)
        • Cerebellar abscess (embolic)
        • Cerebral abscess (embolic)
        • Intracranial epidural abscess or granuloma
        • Intracranial extradural abscess or granuloma
        • Intracranial subdural abscess or granuloma
        • Otogenic abscess (embolic)
        Type 1 Excludes
        • tuberculous intracranial abscess and granuloma (A17.81)
        • sequelae G09
    • subdural G06.2
      ICD-10-CM Diagnosis Code G06.2

      Extradural and subdural abscess, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • brain G06.0
        ICD-10-CM Diagnosis Code G06.0

        Intracranial abscess and granuloma

          2016 2017 2018 2019 2020 2021 Billable/Specific Code
        Applicable To
        • Brain [any part] abscess (embolic)
        • Cerebellar abscess (embolic)
        • Cerebral abscess (embolic)
        • Intracranial epidural abscess or granuloma
        • Intracranial extradural abscess or granuloma
        • Intracranial subdural abscess or granuloma
        • Otogenic abscess (embolic)
        Type 1 Excludes
        • tuberculous intracranial abscess and granuloma (A17.81)
        • sequelae G09
  • Parencephalitis - see also Encephalitis
    • sequelae G09
  • Sequelae (of) - see also condition
    • encephalitis or encephalomyelitis (conditions in G04) G09
    • meningitis
      • bacterial G09 (conditions in G00)
      • other or unspecified cause G09 (conditions in G03)
    • abscess, intracranial or intraspinal G09 (conditions in G06)
    • infection, pyogenic, intracranial or intraspinal G09
    • phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins G09 (conditions in G08)
  • Suppuration, suppurative - see also condition
    • brain G06.0
      ICD-10-CM Diagnosis Code G06.0

      Intracranial abscess and granuloma

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Brain [any part] abscess (embolic)
      • Cerebellar abscess (embolic)
      • Cerebral abscess (embolic)
      • Intracranial epidural abscess or granuloma
      • Intracranial extradural abscess or granuloma
      • Intracranial subdural abscess or granuloma
      • Otogenic abscess (embolic)
      Type 1 Excludes
      • tuberculous intracranial abscess and granuloma (A17.81)
      • sequelae G09
  • Thrombophlebitis I80.9
    ICD-10-CM Diagnosis Code I80.9

    Phlebitis and thrombophlebitis of unspecified site

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • cerebral (sinus) (vein) G08
      ICD-10-CM Diagnosis Code G08

      Intracranial and intraspinal phlebitis and thrombophlebitis

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Septic embolism of intracranial or intraspinal venous sinuses and veins
      • Septic endophlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic phlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic thrombophlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic thrombosis of intracranial or intraspinal venous sinuses and veins
      Type 1 Excludes
      • intracranial phlebitis and thrombophlebitis complicating:
      • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
      • pregnancy, childbirth and the puerperium (O22.5, O87.3)
      • nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6)
      Type 2 Excludes
      • intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
      • sequelae G09
    • intracranial venous sinus (any) G08
      ICD-10-CM Diagnosis Code G08

      Intracranial and intraspinal phlebitis and thrombophlebitis

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Septic embolism of intracranial or intraspinal venous sinuses and veins
      • Septic endophlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic phlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic thrombophlebitis of intracranial or intraspinal venous sinuses and veins
      • Septic thrombosis of intracranial or intraspinal venous sinuses and veins
      Type 1 Excludes
      • intracranial phlebitis and thrombophlebitis complicating:
      • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
      • pregnancy, childbirth and the puerperium (O22.5, O87.3)
      • nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6)
      Type 2 Excludes
      • intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
      • sequelae G09

ICD-10-CM Codes Adjacent To G09
G04.91 Myelitis, unspecified
G05 Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
G05.3 Encephalitis and encephalomyelitis in diseases classified elsewhere
G05.4 Myelitis in diseases classified elsewhere
G06 Intracranial and intraspinal abscess and granuloma
G06.0 Intracranial abscess and granuloma
G06.1 Intraspinal abscess and granuloma
G06.2 Extradural and subdural abscess, unspecified
G07 Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
G08 Intracranial and intraspinal phlebitis and thrombophlebitis
G09 Sequelae of inflammatory diseases of central nervous system
G10 Huntington's disease
G11 Hereditary ataxia
G11.0 Congenital nonprogressive ataxia
G11.1 Early-onset cerebellar ataxia
G11.10 …… unspecified
G11.11 Friedreich ataxia
G11.19 Other early-onset cerebellar ataxia
G11.2 Late-onset cerebellar ataxia
G11.3 Cerebellar ataxia with defective DNA repair
G11.4 Hereditary spastic paraplegia

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.