Chapter VI

Diseases of the nervous system
(G00-G99)

Inflammatory diseases of the central nervous system
(G00-G09)

G00 Bacterial meningitis, not elsewhere classified
Includes: arachnoiditis
leptomeningitis
meningitis
pachymeningitis
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bacterial
Excludes: bacterial:
· meningoencephalitis ( G04.2 )
· meningomyelitis ( G04.2 )
G00.0 Haemophilus meningitis
Meningitis due to Haemophilus influenzae
G00.1 Pneumococcal meningitis
G00.2 Streptococcal meningitis
G00.3 Staphylococcal meningitis
G00.8 Other bacterial meningitis
Meningitis due to:
· Escherichia coli
· Friedländer bacillus
· Klebsiella
G00.9 Bacterial meningitis, unspecified
Meningitis:
· purulent NOS
· pyogenic NOS
· suppurative NOS

G01* Meningitis in bacterial diseases classified elsewhere
Meningitis (in):
· anthrax ( A22.8+ )
· gonococcal ( A54.8+ )
· leptospirosis ( A27.-+ )
· listerial ( A32.1+ )
· Lyme disease ( A69.2+ )
· meningococcal ( A39.0+ )
· neurosyphilis ( A52.1+ )
· salmonella infection ( A02.2+ )
· syphilis:
  · congenital ( A50.4+ )
  · secondary ( A51.4+ )
· tuberculous ( A17.0+ )
· typhoid fever ( A01.0+ )
Excludes: meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere ( G05.0* )

G02* Meningitis in other infectious and parasitic diseases classified elsewhere
Excludes: meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere ( G05.1-G05.2* )
G02.0* Meningitis in viral diseases classified elsewhere
Meningitis (due to):
· adenoviral ( A87.1+ )
· enteroviral ( A87.0+ )
· herpesviral [herpes simplex] ( B00.3+ )
· infectious mononucleosis ( B27.-+ )
· measles ( B05.1+ )
· mumps ( B26.1+ )
· rubella ( B06.0+ )
· varicella [chickenpox] ( B01.0+ )
· zoster ( B02.1+ )
G02.1* Meningitis in mycoses
Meningitis (in):
· candidal ( B37.5+ )
· coccidioidomycosis ( B38.4+ )
· cryptococcal ( B45.1+ )
G02.8* Meningitis in other specified infectious and parasitic diseases classified elsewhere
Meningitis due to:
· African trypanosomiasis ( B56.-+ )
· Chagas' disease (chronic) ( B57.4+ )

G03 Meningitis due to other and unspecified causes
Includes: arachnoiditis
leptomeningitis
meningitis
pachymeningitis
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due to other and unspecified causes
Excludes: meningoencephalitis ( G04.- )
meningomyelitis ( G04.- )
G03.0 Nonpyogenic meningitis
Nonbacterial meningitis
G03.1 Chronic meningitis
G03.2 Benign recurrent meningitis [Mollaret]
G03.8 Meningitis due to other specified causes
G03.9 Meningitis, unspecified
Arachnoiditis (spinal) NOS

G04 Encephalitis, myelitis and encephalomyelitis
Includes: acute ascending myelitis
meningoencephalitis
meningomyelitis
Excludes: benign myalgic encephalomyelitis ( G93.3 )
encephalopathy:
· NOS ( G93.4 )
· alcoholic ( G31.2 )
· toxic ( G92 )
multiple sclerosis ( G35 )
myelitis:
· acute transverse ( G37.3 )
· subacute necrotizing ( G37.4 )
G04.0 Acute disseminated encephalitis
Encephalitis
Encephalomyelitis
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postimmunization
Use additional external cause code (Chapter XX), if desired, to identify vaccine.
G04.1 Tropical spastic paraplegia
G04.2 Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified
G04.8 Other encephalitis, myelitis and encephalomyelitis
Postinfectious encephalitis and encephalomyelitis NOS
G04.9 Encephalitis, myelitis and encephalomyelitis, unspecified
Ventriculitis (cerebral) NOS

G05* Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
Includes: meningoencephalitis and meningomyelitis in diseases classified elsewhere
G05.0* Encephalitis, myelitis and encephalomyelitis in bacterial diseases classified elsewhere
Encephalitis, myelitis or encephalomyelitis (in):
· listerial ( A32.1+ )
· meningococcal ( A39.8+ )
· syphilis:
  · congenital ( A50.4+ )
  · late ( A52.1+ )
· tuberculous ( A17.8+ )
G05.1* Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere
Encephalitis, myelitis or encephalomyelitis (in):
· adenoviral ( A85.1+ )
· cytomegaloviral ( B25.8+ )
· enteroviral ( A85.0+ )
· herpesviral [herpes simplex] ( B00.4+ )
· influenza ( J10.8+ , J11.8+ )
· measles ( B05.0+ )
· mumps ( B26.2+ )
· postchickenpox ( B01.1+ )
· rubella ( B06.0+ )
· zoster ( B02.0+ )
G05.2* Encephalitis, myelitis and encephalomyelitis in other infectious and parasitic diseases classified elsewhere
Encephalitis, myelitis or encephalomyelitis in:
· African trypanosomiasis ( B56.-+ )
· Chagas' disease (chronic) ( B57.4+ )
· naegleriasis ( B60.2+ )
· toxoplasmosis ( B58.2+ )
Eosinophilic meningoencephalitis ( B83.2+ )
G05.8* Encephalitis, myelitis and encephalomyelitis in other diseases classified elsewhere
Encephalitis in systemic lupus erythematosus ( M32.1+ )

G06 Intracranial and intraspinal abscess and granuloma
Use additional code (B95-B97), if desired, to identify infectious agent.
G06.0 Intracranial abscess and granuloma
Abscess (embolic)(of):
· brain [any part]
· cerebellar
· cerebral
· otogenic
Intracranial abscess or granuloma:
· epidural
· extradural
· subdural
G06.1 Intraspinal abscess and granuloma
Abscess (embolic) of spinal cord [any part]
Intraspinal abscess or granuloma:
· epidural
· extradural
· subdural
G06.2 Extradural and subdural abscess, unspecified

G07* Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
Abscess of brain:
· amoebic ( A06.6+ )
· gonococcal ( A54.8+ )
· tuberculous ( A17.8+ )
Schistosomiasis granuloma of brain ( B65.-+ )
Tuberculoma of:
· brain ( A17.8+ )
· meninges ( A17.1+ )

G08 Intracranial and intraspinal phlebitis and thrombophlebitis
Septic:
· embolism
· endophlebitis
· phlebitis
· thrombophlebitis
· thrombosis
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of intracranial or intraspinal venous sinuses and veins
Excludes: intracranial phlebitis and thrombophlebitis:
· complicating:
  · abortion or ectopic or molar pregnancy ( O00-O07 , O08.7 )
  · pregnancy, childbirth and the puerperium ( O22.5 , O87.3 )
· of nonpyogenic origin ( I67.6 )
nonpyogenic intraspinal phlebitis and thrombophlebitis ( G95.1 )

G09 Sequelae of inflammatory diseases of central nervous system
Note: This category is to be used to indicate conditions whose primary classification is to G00-G08 (i.e. excluding those marked with an asterisk (*)) as the cause of sequelae, themselves classifiable elsewhere. The "sequelae" include conditions specified as such or as late effects, or those present one year or more after onset of the causal condition. For use of this category reference should be made to the relevant morbidity and mortality coding rules and guidelines in Volume 2.


Processed on 29.10.2004 M.S. Source: World Health Organization © Copyright WHO/DIMDI 1994/2004