G ICD-10-CM Categories: Category Index
Browse 68 top-level ICD-10-CM categories beginning with G, then follow their complete FY 2027 child-code hierarchies.
Complete category list
Categories beginning with G
Open a category to continue through its complete hierarchy of more specific codes.
G00Bacterial meningitis, not elsewhere classified
G01Meningitis in bacterial diseases classified elsewhere
G02Meningitis in other infectious and parasitic diseases classified elsewhere
G03Meningitis due to other and unspecified causes
G04Encephalitis, myelitis and encephalomyelitis
G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
G06Intracranial and intraspinal abscess and granuloma
G07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
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 primarily affecting central nervous system in diseases classified elsewhere
G14Postpolio syndrome
G20Parkinson's disease
G21Secondary parkinsonism
G23Other degenerative diseases of basal ganglia
G24Dystonia
G25Other extrapyramidal and movement disorders
G26Extrapyramidal and movement disorders in diseases classified elsewhere
G30Alzheimer's disease
G31Other degenerative diseases of nervous system, not elsewhere classified
G32Other degenerative disorders of nervous system in diseases classified elsewhere
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
G53Cranial nerve disorders in diseases classified elsewhere
G54Nerve root and plexus disorders
G55Nerve root and plexus compressions in diseases classified elsewhere
G56Mononeuropathies of upper limb
G57Mononeuropathies of lower limb
G58Other mononeuropathies
G59Mononeuropathy in diseases classified elsewhere
G60Hereditary and idiopathic neuropathy
G61Inflammatory polyneuropathy
G62Other and unspecified polyneuropathies
G63Polyneuropathy in diseases classified elsewhere
G64Other disorders of peripheral nervous system
G65Sequelae of inflammatory and toxic polyneuropathies
G70Myasthenia gravis and other myoneural disorders
G71Primary disorders of muscles
G72Other and unspecified myopathies
G73Disorders of myoneural junction and muscle in diseases classified elsewhere
G80Cerebral palsy
G81Hemiplegia and hemiparesis
G82Paraplegia (paraparesis) and quadriplegia (quadriparesis)
G83Other paralytic syndromes
G89Pain, not elsewhere classified
G90Disorders of autonomic nervous system
G91Hydrocephalus
G92Toxic encephalopathy
G93Other disorders of brain
G94Other disorders of brain in diseases classified elsewhere
G95Other and unspecified diseases of spinal cord
G96Other disorders of central nervous system
G97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified
G98Other disorders of nervous system not elsewhere classified
G99Other disorders of nervous system in diseases classified elsewhere
Transparency
Source and release
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Review the CDC/NCHS ICD-10-CM sourceCategory navigation
Frequently asked questions
Which ICD-10-CM categories begin with G?
This index lists 68 top-level categories beginning with G from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific G code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this G index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every G category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.
Ready to transform your clinical documentation?
Join Vero and see how effortless documentation can be.
No credit card required
Cancel anytime