ICD-10-CM Codes
G00-G99 Diseases of the nervous system
G00-G09 Inflammatory diseases of the central nervous system
G09- Sequelae of inflammatory diseases of central nervous system
2021 ICD-10-CM Diagnosis Code G09

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
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
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
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
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
- 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
- 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.

2021 ICD-10-CM Diagnosis Code G09

Sequelae of inflammatory diseases of central nervous system

Sequelae of inflammatory diseases of central nervous system

Bacterial meningitis, not elsewhere classified

Intracranial and intraspinal phlebitis and thrombophlebitis

Diseases of the nervous system

Sequelae of inflammatory diseases of central nervous system

Cutaneous abscess, unspecified

Intracranial abscess and granuloma

Intracranial abscess and granuloma

Extradural and subdural abscess, unspecified

Intracranial abscess and granuloma

Extradural and subdural abscess, unspecified

Intracranial abscess and granuloma

Intracranial abscess and granuloma

Phlebitis and thrombophlebitis of unspecified site

Intracranial and intraspinal phlebitis and thrombophlebitis

Intracranial and intraspinal phlebitis and thrombophlebitis