About Section G89-G99

Section G89-G99 covers Other disorders of the nervous system within Chapter 6 of the ICD-10-CM Tabular List. This section includes diagnosis codes ranging from G89 to G99. Each code below includes its description, billable status, and links to detailed coding guidelines.
Diagnosis Codes 146 entries
G89Pain, not elsewhere classifiedNon-Billable›G89.0Central pain syndromeBillable›G89.1Acute pain, not elsewhere classifiedNon-Billable›G89.11Acute pain due to traumaBillable›G89.12Acute post-thoracotomy painBillable›G89.18Other acute postprocedural painBillable›G89.2Chronic pain, not elsewhere classifiedNon-Billable›G89.21Chronic pain due to traumaBillable›G89.22Chronic post-thoracotomy painBillable›G89.28Other chronic postprocedural painBillable›G89.29Other chronic painBillable›G89.3Neoplasm related pain (acute) (chronic)Billable›G89.4Chronic pain syndromeBillable›G90Disorders of autonomic nervous systemNon-Billable›G90.0Idiopathic peripheral autonomic neuropathyNon-Billable›G90.01Carotid sinus syncopeBillable›G90.09Other idiopathic peripheral autonomic neuropathyBillable›G90.1Familial dysautonomia [Riley-Day]Billable›G90.2Horner's syndromeBillable›G90.3Multi-system degeneration of the autonomic nervous systemBillable›G90.4Autonomic dysreflexiaBillable›G90.5Complex regional pain syndrome I (CRPS I)Non-Billable›G90.50Complex regional pain syndrome I, unspecifiedBillable›G90.51Complex regional pain syndrome I of upper limbNon-Billable›G90.511Complex regional pain syndrome I of right upper limbBillable›G90.512Complex regional pain syndrome I of left upper limbBillable›G90.513Complex regional pain syndrome I of upper limb, bilateralBillable›G90.519Complex regional pain syndrome I of unspecified upper limbBillable›G90.52Complex regional pain syndrome I of lower limbNon-Billable›G90.521Complex regional pain syndrome I of right lower limbBillable›G90.522Complex regional pain syndrome I of left lower limbBillable›G90.523Complex regional pain syndrome I of lower limb, bilateralBillable›G90.529Complex regional pain syndrome I of unspecified lower limbBillable›G90.59Complex regional pain syndrome I of other specified siteBillable›G90.8Other disorders of autonomic nervous systemNon-Billable›G90.81Serotonin syndromeBillable›G90.89Other disorders of autonomic nervous systemBillable›G90.9Disorder of the autonomic nervous system, unspecifiedBillable›G90.APostural orthostatic tachycardia syndrome [POTS]Billable›G90.BLMNB1-related autosomal dominant leukodystrophyBillable›G91HydrocephalusNon-Billable›G91.0Communicating hydrocephalusBillable›G91.1Obstructive hydrocephalusBillable›G91.2(Idiopathic) normal pressure hydrocephalusBillable›G91.3Post-traumatic hydrocephalus, unspecifiedBillable›G91.4Hydrocephalus in diseases classified elsewhereBillable›G91.8Other hydrocephalusBillable›G91.9Hydrocephalus, unspecifiedBillable›G92Toxic encephalopathyNon-Billable›G92.0Immune effector cell-associated neurotoxicity syndromeNon-Billable›G92.00Immune effector cell-associated neurotoxicity syndrome, grade unspecifiedBillable›G92.01Immune effector cell-associated neurotoxicity syndrome, grade 1Billable›G92.02Immune effector cell-associated neurotoxicity syndrome, grade 2Billable›G92.03Immune effector cell-associated neurotoxicity syndrome, grade 3Billable›G92.04Immune effector cell-associated neurotoxicity syndrome, grade 4Billable›G92.05Immune effector cell-associated neurotoxicity syndrome, grade 5Billable›G92.8Other toxic encephalopathyBillable›G92.9Unspecified toxic encephalopathyBillable›G93Other disorders of brainNon-Billable›G93.0Cerebral cystsBillable›G93.1Anoxic brain damage, not elsewhere classifiedBillable›G93.2Benign intracranial hypertensionBillable›G93.3Postviral and related fatigue syndromesNon-Billable›G93.31Postviral fatigue syndromeBillable›G93.32Myalgic encephalomyelitis/chronic fatigue syndromeBillable›G93.39Other post infection and related fatigue syndromesBillable›G93.4Other and unspecified encephalopathyNon-Billable›G93.40Encephalopathy, unspecifiedBillable›G93.41Metabolic encephalopathyBillable›G93.42Megalencephalic leukoencephalopathy with subcortical cystsBillable›G93.43Leukoencephalopathy with calcifications and cystsBillable›G93.44Adult-onset leukodystrophy with axonal spheroidsBillable›G93.45Developmental and epileptic encephalopathyBillable›G93.49Other encephalopathyBillable›G93.5Compression of brainBillable›G93.6Cerebral edemaBillable›G93.7Reye's syndromeBillable›G93.8Other specified disorders of brainNon-Billable›G93.81Temporal sclerosisBillable›G93.82Brain deathBillable›G93.89Other specified disorders of brainBillable›G93.9Disorder of brain, unspecifiedBillable›G94Other disorders of brain in diseases classified elsewhereBillable›G95Other and unspecified diseases of spinal cordNon-Billable›G95.0Syringomyelia and syringobulbiaBillable›G95.1Vascular myelopathiesNon-Billable›G95.11Acute infarction of spinal cord (embolic) (nonembolic)Billable›G95.19Other vascular myelopathiesBillable›G95.2Other and unspecified cord compressionNon-Billable›G95.20Unspecified cord compressionBillable›G95.29Other cord compressionBillable›G95.8Other specified diseases of spinal cordNon-Billable›G95.81Conus medullaris syndromeBillable›G95.89Other specified diseases of spinal cordBillable›G95.9Disease of spinal cord, unspecifiedBillable›G96Other disorders of central nervous systemNon-Billable›G96.0Cerebrospinal fluid leakNon-Billable›G96.00Cerebrospinal fluid leak, unspecifiedBillable›G96.01Cranial cerebrospinal fluid leak, spontaneousBillable›G96.02Spinal cerebrospinal fluid leak, spontaneousBillable›G96.08Other cranial cerebrospinal fluid leakBillable›G96.09Other spinal cerebrospinal fluid leakBillable›G96.1Disorders of meninges, not elsewhere classifiedNon-Billable›G96.11Dural tearBillable›G96.12Meningeal adhesions (cerebral) (spinal)Billable›G96.19Other disorders of meninges, not elsewhere classifiedNon-Billable›G96.191Perineural cystBillable›G96.198Other disorders of meninges, not elsewhere classifiedBillable›G96.8Other specified disorders of central nervous systemNon-Billable›G96.81Intracranial hypotensionNon-Billable›G96.810Intracranial hypotension, unspecifiedBillable›G96.811Intracranial hypotension, spontaneousBillable›G96.819Other intracranial hypotensionBillable›G96.89Other specified disorders of central nervous systemBillable›G96.9Disorder of central nervous system, unspecifiedBillable›G97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classifiedNon-Billable›G97.0Cerebrospinal fluid leak from spinal punctureBillable›G97.1Other reaction to spinal and lumbar punctureBillable›G97.2Intracranial hypotension following ventricular shuntingBillable›G97.3Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a procedureNon-Billable›G97.31Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedureBillable›G97.32Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating other procedureBillable›G97.4Accidental puncture and laceration of a nervous system organ or structure during a procedureNon-Billable›G97.41Accidental puncture or laceration of dura during a procedureBillable›G97.48Accidental puncture and laceration of other nervous system organ or structure during a nervous system procedureBillable›G97.49Accidental puncture and laceration of other nervous system organ or structure during other procedureBillable›G97.5Postprocedural hemorrhage of a nervous system organ or structure following a procedureNon-Billable›G97.51Postprocedural hemorrhage of a nervous system organ or structure following a nervous system procedureBillable›G97.52Postprocedural hemorrhage of a nervous system organ or structure following other procedureBillable›G97.6Postprocedural hematoma and seroma of a nervous system organ or structure following a procedureNon-Billable›G97.61Postprocedural hematoma of a nervous system organ or structure following a nervous system procedureBillable›G97.62Postprocedural hematoma of a nervous system organ or structure following other procedureBillable›G97.63Postprocedural seroma of a nervous system organ or structure following a nervous system procedureBillable›G97.64Postprocedural seroma of a nervous system organ or structure following other procedureBillable›G97.8Other intraoperative and postprocedural complications and disorders of nervous systemNon-Billable›G97.81Other intraoperative complications of nervous systemBillable›G97.82Other postprocedural complications and disorders of nervous systemBillable›G97.83Intracranial hypotension following lumbar cerebrospinal fluid shuntingBillable›G97.84Intracranial hypotension following other procedureBillable›G98Other disorders of nervous system not elsewhere classifiedNon-Billable›G98.0Neurogenic arthritis, not elsewhere classifiedBillable›G98.8Other disorders of nervous systemBillable›G99Other disorders of nervous system in diseases classified elsewhereNon-Billable›G99.0Autonomic neuropathy in diseases classified elsewhereBillable›G99.2Myelopathy in diseases classified elsewhereBillable›G99.8Other specified disorders of nervous system in diseases classified elsewhereBillable›