G00–G99: Diseases of the Nervous System
Chapter 6 of ICD-10-CM 2027, 932 codes in 11 blocks.
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Chapter instructions
Excludes2: not included here, code separately if applicable
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Codes in this chapter
All codesBillable only932 results
- G90.0Idiopathic peripheral autonomic neuropathy
- G90.01Carotid sinus syncope
- G90.09Other idiopathic peripheral autonomic neuropathy
- G90.1Familial dysautonomia [Riley-Day]
- G90.2Horner's syndrome
- G90.3Multi-system degeneration of the autonomic nervous system
- G90.4Autonomic dysreflexia
- G90.5Complex regional pain syndrome I (CRPS I)
- G90.50Complex regional pain syndrome I, unspecified
- G90.51Complex regional pain syndrome I of upper limb
- G90.511Complex regional pain syndrome I of right upper limb
- G90.512Complex regional pain syndrome I of left upper limb
- G90.513Complex regional pain syndrome I of upper limb, bilateral
- G90.519Complex regional pain syndrome I of unspecified upper limb
- G90.52Complex regional pain syndrome I of lower limb
- G90.521Complex regional pain syndrome I of right lower limb
- G90.522Complex regional pain syndrome I of left lower limb
- G90.523Complex regional pain syndrome I of lower limb, bilateral
- G90.529Complex regional pain syndrome I of unspecified lower limb
- G90.59Complex regional pain syndrome I of other specified site
- G90.8Other disorders of autonomic nervous system
- G90.81Serotonin syndrome
- G90.89Other disorders of autonomic nervous system
- G90.9Disorder of the autonomic nervous system, unspecified
- G90.APostural orthostatic tachycardia syndrome [POTS]
- G90.BLMNB1-related autosomal dominant leukodystrophy
- G91Hydrocephalus
- G91.0Communicating hydrocephalus
- G91.1Obstructive hydrocephalus
- G91.2(Idiopathic) normal pressure hydrocephalus
- G91.3Post-traumatic hydrocephalus, unspecified
- G91.4Hydrocephalus in diseases classified elsewhere
- G91.8Other hydrocephalus
- G91.9Hydrocephalus, unspecified
- G92Toxic encephalopathy
- G92.0Immune effector cell-associated neurotoxicity syndrome
- G92.00Immune effector cell-associated neurotoxicity syndrome, grade unspecified
- G92.01Immune effector cell-associated neurotoxicity syndrome, grade 1
- G92.02Immune effector cell-associated neurotoxicity syndrome, grade 2
- G92.03Immune effector cell-associated neurotoxicity syndrome, grade 3
- G92.04Immune effector cell-associated neurotoxicity syndrome, grade 4
- G92.05Immune effector cell-associated neurotoxicity syndrome, grade 5
- G92.8Other toxic encephalopathy
- G92.9Unspecified toxic encephalopathy
- G93Other disorders of brain
- G93.0Cerebral cysts
- G93.1Anoxic brain damage, not elsewhere classified
- G93.2Benign intracranial hypertension
- G93.3Postviral and related fatigue syndromes
- G93.31Postviral fatigue syndrome