ICD-10-CM
Diseases of the nervous system
Chapter 6, G00-G99. CDC FY2027 file dated June 16, 2026.
License: a US government work, in the public domain (Public Domain Mark 1.0).
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Categories
68 categories in this chapter. Open one, or page through every code below.
- G00Bacterial meningitis, not elsewhere classified
- G01Meningitis in bacterial diseases classified elsewhere
- G02Meningitis in other infec/parastc diseases classd elswhr
- G03Meningitis due to other and unspecified causes
- G04Encephalitis, myelitis and encephalomyelitis
- G05Encphlts, myelitis and encephalomyelitis in dis classd elswhr
- G06Intracranial and intraspinal abscess and granuloma
- G07Intcrn and intraspinal abscs and granuloma in dis classd elswhr
- G08Intracranial and intraspinal phlebitis and thrombophlebitis
- G09Sequelae of inflammatory diseases of central nervous system
- G10Huntington's disease
- G11Hereditary ataxia
- G12Spinal muscular atrophy and related syndromes
- G13Systemic atrophies aff cnsl in diseases classd elswhr
- G14Postpolio syndrome
- G20Parkinson's disease
- G21Secondary parkinsonism
- G23Other degenerative diseases of basal ganglia
- G24Dystonia
- G25Other extrapyramidal and movement disorders
- G26Extrapyramidal and movement disord in diseases classd elswhr
- G30Alzheimer's disease
- G31Other degenerative diseases of nervous system, NEC
- G32Other degeneratv disord of nervous system in dis classd elswhr
- G35Multiple sclerosis
- G36Other acute disseminated demyelination
- G37Other demyelinating diseases of central nervous system
- G40Epilepsy and recurrent seizures
- G43Migraine
- G44Other headache syndromes
- G45Transient cerebral ischemic attacks and related syndromes
- G46Vascular syndromes of brain in cerebrovascular diseases
- G47Sleep disorders
- G50Disorders of trigeminal nerve
- G51Facial nerve disorders
- G52Disorders of other cranial nerves
32 more categories are in this chapter. Type a code or a term to open one.
Codes
A header groups codes and is not billed. A billable code is one you can report.
241 to 280 of 932
- G40.40Other generalized epilepsy, not intractableHeader
- G40.401Other generalized epilepsy, not intractable, with stat epiBillable
- G40.409Other generalized epilepsy, not intractable, without stat epiBillable
- G40.41Other generalized epilepsy, intractableHeader
- G40.411Other generalized epilepsy, intractable, with status epilepticusBillable
- G40.419Other generalized epilepsy, intractable, without stat epiBillable
- G40.42Cyclin-Dependent Kinase-Like 5 Deficiency DisorderBillable
- G40.5Epileptic seizures related to external causesHeader
- G40.50Epileptic seizures related to external causes, not ntrctHeader
- G40.501Epileptic seiz rel to extrn causes, not ntrct, with stat epiBillable
- G40.509Epileptic seiz rel to extrn causes, not ntrct, without stat epiBillable
- G40.8Other epilepsy and recurrent seizuresHeader
- G40.80Other epilepsyHeader
- G40.801Other epilepsy, not intractable, with status epilepticusBillable
- G40.802Other epilepsy, not intractable, without status epilepticusBillable
- G40.803Other epilepsy, intractable, with status epilepticusBillable
- G40.804Other epilepsy, intractable, without status epilepticusBillable
- G40.81Lennox-Gastaut syndromeHeader
- G40.811Lennox-Gastaut syndrome, not intractable, with stat epiBillable
- G40.812Lennox-Gastaut syndrome, not intractable, without stat epiBillable
- G40.813Lennox-Gastaut syndrome, intractable, with status epilepticusBillable
- G40.814Lennox-Gastaut syndrome, intractable, without status epilepticusBillable
- G40.82Epileptic spasmsHeader
- G40.821Epileptic spasms, not intractable, with status epilepticusBillable
- G40.822Epileptic spasms, not intractable, without status epilepticusBillable
- G40.823Epileptic spasms, intractable, with status epilepticusBillable
- G40.824Epileptic spasms, intractable, without status epilepticusBillable
- G40.83Dravet syndromeHeader
- G40.833Dravet syndrome, intractable, with status epilepticusBillable
- G40.834Dravet syndrome, intractable, without status epilepticusBillable
- G40.84KCNQ2-related epilepsyHeader
- G40.841KCNQ2-related epilepsy, not intractable, with stat epiBillable
- G40.842KCNQ2-related epilepsy, not intractable, without stat epiBillable
- G40.843KCNQ2-related epilepsy, intractable, with status epilepticusBillable
- G40.844KCNQ2-related epilepsy, intractable, without stat epiBillable
- G40.89Other seizuresBillable
- G40.9Epilepsy, unspecifiedHeader
- G40.90Epilepsy, unspecified, not intractableHeader
- G40.901Epilepsy, unspecified, not intractable, with status epilepticusBillable
- G40.909Epilepsy, unspecified, not intractable, without status epilepticusBillable