Diseases of the nervous system (G00-G99)

Excludes 2:
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)

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

G00 Bacterial meningitis, not elsewhere classified [+]
Includes: bacterial arachnoiditis
bacterial leptomeningitis
bacterial meningitis
bacterial pachymeningitis
Excludes 1: bacterial meningoencephalitis (G04.2)
bacterial meningomyelitis (G04.2)
G01 Meningitis in bacterial diseases classified elsewhere
Code first underlying disease
Excludes 1: meningitis (in):
gonococcal (A54.81)
leptospirosis (A27.81)
listeriosis (A32.11)
Lyme disease (A69.21)
meningococcal (A39.0)
neurosyphilis (A52.13)
tuberculosis (A17.0)
meningoencephalitis and meningomyelitis in bacterial diseases classified elsewhere (G05)
G02 Meningitis in other infectious and parasitic diseases classified elsewhere
Code first underlying disease, such as:
African trypanosomiasis (B56.-)
poliovirus infection (A80.-)
Excludes 1: candidal meningitis (B37.5)
coccidioidomycosis meningitis (B38.4)
cryptococcal meningitis (B45.1)
herpesviral [herpes simplex] meningitis (B00.3)
infectious mononucleosis complicated by meningitis (B27.- with fifth character 2)
measles complicated by meningitis (B05.1)
meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere (G05)
mumps meningitis (B26.1)
rubella meningitis (B06.02)
varicella [chickenpox] meningitis (B01.0)
zoster meningitis (B02.1)
G03 Meningitis due to other and unspecified causes [+]
Includes: arachnoiditis NOS
leptomeningitis NOS
meningitis NOS
pachymeningitis NOS
Excludes 1: meningoencephalitis (G04.-)
meningomyelitis (G04.-)
G04 Encephalitis, myelitis and encephalomyelitis [+]
Includes: acute ascending myelitis
meningoencephalitis
meningomyelitis
Excludes 1: encephalopathy NOS (G93.40)
Excludes 2: acute transverse myelitis (G37.3)
alcoholic encephalopathy (G31.2)
multiple sclerosis (G35)
myalgic encephalomyelitis (G93.32)
subacute necrotizing myelitis (G37.4)
toxic encephalitis (G92.8)
toxic encephalopathy (G92.8)
G05 Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere [+]
Code first underlying disease, such as:
congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)
cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)
encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)
eosinophilic meningoencephalitis (B83.2)
human immunodeficiency virus [HIV] disease (B20)
poliovirus (A80.-)
suppurative otitis media (H66.01-H66.4)
systemic lupus erythematosus (M32.19)
trichinellosis (B75)
Excludes 1: adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)
encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)
enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)
herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)
listerial encephalitis, myelitis and encephalomyelitis (A32.12)
meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)
mumps encephalitis, myelitis and encephalomyelitis (B26.2)
postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)
rubella encephalitis, myelitis and encephalomyelitis (B06.01)
toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)
zoster encephalitis, myelitis and encephalomyelitis (B02.0)
G06 Intracranial and intraspinal abscess and granuloma [+]
Use additional code (B95-B97) to identify infectious agent.
G07 Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
Code first underlying disease, such as:
schistosomiasis granuloma of brain (B65.-)
Excludes 1: abscess of brain:
amebic (A06.6)
chromomycotic (B43.1)
gonococcal (A54.82)
tuberculous (A17.81)
tuberculoma of meninges (A17.1)
G08 Intracranial and intraspinal phlebitis and thrombophlebitis
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
Excludes 1: 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)
Excludes 2: intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
G09 Sequelae 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.
Code first condition resulting from (sequela) of inflammatory diseases of central nervous system

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