• Diseases of the nervous system

        • G89 - Pain, not elsewhere classified
        • G89.0 - Central pain syndrome
        • G89.1 - Acute pain, not elsewhere classified
        • G89.11 - Acute pain due to trauma
        • G89.12 - Acute post-thoracotomy pain
        • G89.18 - Other acute postprocedural pain
        • G89.2 - Chronic pain, not elsewhere classified
        • G89.21 - Chronic pain due to trauma
        • G89.22 - Chronic post-thoracotomy pain
        • G89.28 - Other chronic postprocedural pain
        • G89.29 - Other chronic pain
        • G89.3 - Neoplasm related pain (acute) (chronic)
        • G89.4 - Chronic pain syndrome
        • G90 - Disorders of autonomic nervous system
        • G90.0 - Idiopathic peripheral autonomic neuropathy
        • G90.01 - Carotid sinus syncope
        • G90.09 - Other idiopathic peripheral autonomic neuropathy
        • G90.1 - Familial dysautonomia [Riley-Day]
        • G90.2 - Horner's syndrome
        • G90.3 - Multi-system degeneration of the autonomic nervous system
        • G90.4 - Autonomic dysreflexia
        • G90.5 - Complex regional pain syndrome I (CRPS I)
        • G90.50 - Complex regional pain syndrome I, unspecified
        • G90.51 - Complex regional pain syndrome I of upper limb
        • G90.511 - Complex regional pain syndrome I of right upper limb
        • G90.512 - Complex regional pain syndrome I of left upper limb
        • G90.513 - Complex regional pain syndrome I of upper limb, bilateral
        • G90.519 - Complex regional pain syndrome I of unspecified upper limb
        • G90.52 - Complex regional pain syndrome I of lower limb
        • G90.521 - Complex regional pain syndrome I of right lower limb
        • G90.522 - Complex regional pain syndrome I of left lower limb
        • G90.523 - Complex regional pain syndrome I of lower limb, bilateral
        • G90.529 - Complex regional pain syndrome I of unspecified lower limb
        • G90.59 - Complex regional pain syndrome I of other specified site
        • G90.8 - Other disorders of autonomic nervous system
        • G90.9 - Disorder of the autonomic nervous system, unspecified
        • G90.A - Postural orthostatic tachycardia syndrome [POTS]
        • G90.B - LMNB1-related autosomal dominant leukodystrophy
        • G91 - Hydrocephalus
        • G91.0 - Communicating hydrocephalus
        • G91.1 - Obstructive hydrocephalus
        • G91.2 - (Idiopathic) normal pressure hydrocephalus
        • G91.3 - Post-traumatic hydrocephalus, unspecified
        • G91.4 - Hydrocephalus in diseases classified elsewhere
        • G91.8 - Other hydrocephalus
        • G91.9 - Hydrocephalus, unspecified
        • G92 - Toxic encephalopathy
        • G92.0 - Immune effector cell-associated neurotoxicity syndrome
        • G92.00 - Immune effor cell-associated neurotoxicity synd, grade unsp
        • G92.01 - Immune effector cell-associated neurotoxicity synd, grade 1
        • G92.02 - Immune effector cell-associated neurotoxicity synd, grade 2
        • G92.03 - Immune effector cell-associated neurotoxicity synd, grade 3
        • G92.04 - Immune effector cell-associated neurotoxicity synd, grade 4
        • G92.05 - Immune effector cell-associated neurotoxicity synd, grade 5
        • G92.8 - Other toxic encephalopathy
        • G92.9 - Unspecified toxic encephalopathy
        • G93 - Other disorders of brain
        • G93.0 - Cerebral cysts
        • G93.1 - Anoxic brain damage, not elsewhere classified
        • G93.2 - Benign intracranial hypertension
        • G93.3 - Postviral and related fatigue syndromes
        • G93.31 - Postviral fatigue syndrome
        • G93.32 - Myalgic encephalomyelitis/chronic fatigue syndrome
        • G93.39 - Other post infection and related fatigue syndromes
        • G93.4 - Other and unspecified encephalopathy
        • G93.40 - Encephalopathy, unspecified
        • G93.41 - Metabolic encephalopathy
        • G93.42 - Megaloencephalic leukoencephalopathy with subcortical cysts
        • G93.43 - Leukoencephalopathy with calcifications and cysts
        • G93.44 - Adult-onset leukodystrophy with axonal spheroids
        • G93.49 - Other encephalopathy
        • G93.5 - Compression of brain
        • G93.6 - Cerebral edema
        • G93.7 - Reye's syndrome
        • G93.8 - Other specified disorders of brain
        • G93.81 - Temporal sclerosis
        • G93.82 - Brain death
        • G93.89 - Other specified disorders of brain
        • G93.9 - Disorder of brain, unspecified
        • G96 - Other disorders of central nervous system
        • G96.0 - Cerebrospinal fluid leak
        • G96.00 - Cerebrospinal fluid leak, unspecified
        • G96.01 - Cranial cerebrospinal fluid leak, spontaneous
        • G96.02 - Spinal cerebrospinal fluid leak, spontaneous
        • G96.08 - Other cranial cerebrospinal fluid leak
        • G96.09 - Other spinal cerebrospinal fluid leak
        • G96.1 - Disorders of meninges, not elsewhere classified
        • G96.11 - Dural tear
        • G96.12 - Meningeal adhesions (cerebral) (spinal)
        • G96.19 - Other disorders of meninges, not elsewhere classified
        • G96.191 - Perineural cyst
        • G96.198 - Other disorders of meninges, not elsewhere classified
        • G96.8 - Other specified disorders of central nervous system
        • G96.81 - Intracranial hypotension
        • G96.810 - Intracranial hypotension, unspecified
        • G96.811 - Intracranial hypotension, spontaneous
        • G96.819 - Other intracranial hypotension
        • G96.89 - Other specified disorders of central nervous system
        • G96.9 - Disorder of central nervous system, unspecified
        • G97 - Intraop and postproc comp and disorders of nervous sys, NEC
        • G97.0 - Cerebrospinal fluid leak from spinal puncture
        • G97.1 - Other reaction to spinal and lumbar puncture
        • G97.2 - Intracranial hypotension following ventricular shunting
        • G97.3 - Intraop hemor/hemtom of a nervous sys org comp a procedure
        • G97.31 - Intraop hemor/hemtom of a nervous sys org comp nrv sys proc
        • G97.32 - Intraop hemor/hemtom of a nervous sys org comp oth procedure
        • G97.4 - Accidental pnctr & lac of a nervous system org dur proc
        • G97.41 - Accidental puncture or laceration of dura during a procedure
        • G97.48 - Acc pnctr & lac of nervous sys org during a nervous sys proc
        • G97.49 - Acc pnctr & lac of nervous sys org during oth procedure
        • G97.5 - Postproc hemor of a nervous sys org following a procedure
        • G97.51 - Postproc hemor of a nervous sys org fol a nervous sys proc
        • G97.52 - Postproc hemor of a nervous sys org fol other procedure
        • G97.6 - Postproc hematoma and seroma of a nervous sys org fol a proc
        • G97.61 - Postp hematoma of a nervous sys org fol a nervous sys proc
        • G97.62 - Postproc hematoma of a nervous sys org fol other procedure
        • G97.63 - Postproc seroma of a nervous sys org fol a nervous sys proc
        • G97.64 - Postproc seroma of a nervous sys org fol other procedure
        • G97.8 - Oth intraop and postproc comp and disorders of nervous sys
        • G97.81 - Other intraoperative complications of nervous system
        • G97.82 - Oth postproc complications and disorders of nervous sys
        • G97.83 - Intracranial hypotension following lumbar CSF shunting
        • G97.84 - Intracranial hypotension following other procedure