Circular 06/2026
Chapter VI — Diseases of the nervous system
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G00-G09 — Inflammatory diseases of the central nervous system
G00Bacterial meningitis, not elsewhere classifiedG01*Meningitis in bacterial diseases classified elsewhereG02*Meningitis in other infectious and parasitic diseases classified elsewhereG03Meningitis due to other and unspecified causesG04Encephalitis, myelitis and encephalomyelitisG05*Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhereG06Intracranial and intraspinal abscess and granulomaG07*Intracranial and intraspinal abscess and granuloma in diseases classified elsewhereG08Intracranial and intraspinal phlebitis and thrombophlebitisG09Sequelae of inflammatory diseases of central nervous system
G10-G14 — Systemic atrophies primarily affecting the central nervous system
G20-G26 — Extrapyramidal and movement disorders
G30-G32 — Other degenerative diseases of the nervous system
G35-G37 — Demyelinating diseases of the central nervous system
G40-G47 — Episodic and paroxysmal disorders
G50-G59 — Nerve, nerve root and plexus disorders
G50Disorders of trigeminal nerveG51Facial nerve disordersG52Disorders of other cranial nervesG53*Cranial nerve disorders in diseases classified elsewhereG54Nerve root and plexus disordersG55*Nerve root and plexus compressions in diseases classified elsewhereG56Mononeuropathies of upper limbG57Mononeuropathies of lower limbG58Other mononeuropathiesG59*Mononeuropathy in diseases classified elsewhere
G60-G64 — Polyneuropathies and other disorders of the peripheral nervous system
G70-G73 — Diseases of myoneural junction and muscle
G80-G83 — Cerebral palsy and other paralytic syndromes
G90-G99 — Other disorders of the nervous system
G90Disorders of autonomic nervous systemG91HydrocephalusG92Toxic encephalopathyG93Other disorders of brainG94*Other disorders of brain in diseases classified elsewhereG95Other diseases of spinal cordG96Other disorders of central nervous systemG97Postprocedural disorders of nervous system, not elsewhere classifiedG98Other disorders of nervous system, not elsewhere classifiedG99*Other disorders of nervous system in diseases classified elsewhere