G00–G99
Diseases of the Nervous System
Parkinson's, epilepsy, migraine, neuropathy
G00
Bacterial meningitis, not elsewhere classified
Non-billable
G00.0
Hemophilus meningitis
Billable
G00.1
Pneumococcal meningitis
Billable
G00.2
Streptococcal meningitis
Billable
G00.3
Staphylococcal meningitis
Billable
G00.8
Other bacterial meningitis
Billable
G00.9
Bacterial meningitis, unspecified
Billable
G01
Meningitis in bacterial diseases classified elsewhere
Billable
G02
Meningitis in other infectious and parasitic diseases classified elsewhere
Billable
G03
Meningitis due to other and unspecified causes
Non-billable
G03.0
Nonpyogenic meningitis
Billable
G03.1
Chronic meningitis
Billable
G03.2
Benign recurrent meningitis [Mollaret]
Billable
G03.8
Meningitis due to other specified causes
Billable
G03.9
Meningitis, unspecified
Billable
G04
Encephalitis, myelitis and encephalomyelitis
Non-billable
G04.0
Acute disseminated encephalitis and encephalomyelitis (ADEM)
Non-billable
G04.00
Acute disseminated encephalitis and encephalomyelitis, unspecified
Billable
G04.01
Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
Billable
G04.02
Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
Billable
G04.1
Tropical spastic paraplegia
Billable
G04.2
Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified
Billable
G04.3
Acute necrotizing hemorrhagic encephalopathy
Non-billable
G04.30
Acute necrotizing hemorrhagic encephalopathy, unspecified
Billable
G04.31
Postinfectious acute necrotizing hemorrhagic encephalopathy
Billable
G04.32
Postimmunization acute necrotizing hemorrhagic encephalopathy
Billable
G04.39
Other acute necrotizing hemorrhagic encephalopathy
Billable
G04.8
Other encephalitis, myelitis and encephalomyelitis
Non-billable
G04.81
Other encephalitis and encephalomyelitis
Billable
G04.82
Acute flaccid myelitis
Billable
G04.89
Other myelitis
Billable
G04.9
Encephalitis, myelitis and encephalomyelitis, unspecified
Non-billable
G04.90
Encephalitis and encephalomyelitis, unspecified
Billable
G04.91
Myelitis, unspecified
Billable
G05
Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
Non-billable
G05.3
Encephalitis and encephalomyelitis in diseases classified elsewhere
Billable
G05.4
Myelitis in diseases classified elsewhere
Billable
G06
Intracranial and intraspinal abscess and granuloma
Non-billable
G06.0
Intracranial abscess and granuloma
Billable
G06.1
Intraspinal abscess and granuloma
Billable
G06.2
Extradural and subdural abscess, unspecified
Billable
G07
Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
Billable
G08
Intracranial and intraspinal phlebitis and thrombophlebitis
Billable
G09
Sequelae of inflammatory diseases of central nervous system
Billable
G10
Huntington's disease
Billable
G11
Hereditary ataxia
Non-billable
G11.0
Congenital nonprogressive ataxia
Billable
G11.1
Early-onset cerebellar ataxia
Non-billable
G11.10
Early-onset cerebellar ataxia, unspecified
Billable
G11.11
Friedreich ataxia
Billable
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