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.
Categories beginning with G
Open a category to continue through its complete hierarchy of more specific codes.
G00Bacterial meningitis, not elsewhere classifiedG01Meningitis in bacterial diseases classified elsewhereG02Meningitis in other infectious and parasitic diseases classified elsewhereG03Meningitis due to other and unspecified causesG04Encephalitis, myelitis and encephalomyelitisG05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhereG06Intracranial and intraspinal abscess and granulomaG07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhereG08Intracranial and intraspinal phlebitis and thrombophlebitisG09Sequelae of inflammatory diseases of central nervous systemG10Huntington's diseaseG11Hereditary ataxiaG12Spinal muscular atrophy and related syndromesG13Systemic atrophies primarily affecting central nervous system in diseases classified elsewhereG14Postpolio syndromeG20Parkinson's diseaseG21Secondary parkinsonismG23Other degenerative diseases of basal gangliaG24DystoniaG25Other extrapyramidal and movement disordersG26Extrapyramidal and movement disorders in diseases classified elsewhereG30Alzheimer's diseaseG31Other degenerative diseases of nervous system, not elsewhere classifiedG32Other degenerative disorders of nervous system in diseases classified elsewhereG35Multiple sclerosisG36Other acute disseminated demyelinationG37Other demyelinating diseases of central nervous systemG40Epilepsy and recurrent seizuresG43MigraineG44Other headache syndromesG45Transient cerebral ischemic attacks and related syndromesG46Vascular syndromes of brain in cerebrovascular diseasesG47Sleep disordersG50Disorders of trigeminal nerveG51Facial nerve disordersG52Disorders of other cranial nervesG53Cranial nerve disorders in diseases classified elsewhereG54Nerve root and plexus disordersG55Nerve root and plexus compressions in diseases classified elsewhereG56Mononeuropathies of upper limbG57Mononeuropathies of lower limbG58Other mononeuropathiesG59Mononeuropathy in diseases classified elsewhereG60Hereditary and idiopathic neuropathyG61Inflammatory polyneuropathyG62Other and unspecified polyneuropathiesG63Polyneuropathy in diseases classified elsewhereG64Other disorders of peripheral nervous systemG65Sequelae of inflammatory and toxic polyneuropathiesG70Myasthenia gravis and other myoneural disordersG71Primary disorders of musclesG72Other and unspecified myopathiesG73Disorders of myoneural junction and muscle in diseases classified elsewhereG80Cerebral palsyG81Hemiplegia and hemiparesisG82Paraplegia (paraparesis) and quadriplegia (quadriparesis)G83Other paralytic syndromesG89Pain, not elsewhere classifiedG90Disorders of autonomic nervous systemG91HydrocephalusG92Toxic encephalopathyG93Other disorders of brainG94Other disorders of brain in diseases classified elsewhereG95Other and unspecified diseases of spinal cordG96Other disorders of central nervous systemG97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classifiedG98Other disorders of nervous system not elsewhere classifiedG99Other disorders of nervous system in diseases classified elsewhereSource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
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.
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.