Diseases of the Nervous System

Codes Discussed: G00-G99 (Diseases of the nervous system), G89 (Pain, not elsewhere classified category), F02 (Dementia in other diseases classified elsewhere category), R40 (Somnolence, stupor, and coma category), R40.2 (Coma category), G00-G03 (Meningitis code block), G00.2 (Streptococcal meningitis), G00.3 (Staphylococcal meningitis), G00.8 (Other bacterial meningitis), G03.9 (Meningitis, unspecified), G03.0 (Nonpyogenic meningitis/aseptic meningitis), G00.9 (Bacterial meningitis, unspecified), A87.9 (Viral meningitis, unspecified), A42.81 (Actinomycotic meningitis), A39.0 (Meningococcal meningitis), G04 (Encephalitis, myelitis, and encephalomyelitis category), G05 (Encephalitis, myelitis, and encephalomyelitis in diseases classified elsewhere category), B20 (Human immunodeficiency virus disease), G05.3 (Encephalitis and encephalomyelitis in diseases classified elsewhere), G09 (Sequelae of inflammatory diseases of central nervous system), G20.C (Parkinsonism, unspecified), G20.A1 (Parkinson’s disease without dyskinesia, without mention of fluctuations), G20.B1 (Parkinson’s disease with dyskinesia, without mention of fluctuations), G30-G31 (Alzheimer’s disease and other degenerative diseases of nervous system code block), F10 (Alcohol-related disorders category), G40.001-G40.919 (Epilepsy and recurrent seizures code range), G40 (Epilepsy and recurrent seizures category), G40.909 (Epilepsy, unspecified, not intractable, without status epilepticus), G40.919 (Epilepsy, unspecified, intractable, without status epilepticus), G40.A09 (Absence epileptic syndrome, not intractable, without status epilepticus), G40.B09 (Juvenile myoclonic epilepsy, not intractable, without status epilepticus), R56.9 (Unspecified convulsions), G43 (Migraine category), G43.A (Cyclical vomiting associated with migraine category), R11.15 (Cyclical vomiting syndrome unrelated to migraine), G43.109 (Migraine with aura, not intractable, without status migrainosus), G44.001-G44.89 (Other headache syndromes code range), R51 (Headache category), G45.0-G45.9 (Transient cerebral ischemic attacks and related syndromes code range), G45.0 (Vertebro-basilar artery syndrome), G45.4 (Transient global amnesia), R41.3 (Other amnesia), G45.9 (Transient cerebral ischemic attack, unspecified), G47.00-G47.9 (Sleep disorders code range), G47.33 (Obstructive sleep apnea), G56-G59 (Mononeuropathies code block), G56.01 (Carpal tunnel syndrome, right upper limb), G56.00 (Carpal tunnel syndrome, unspecified upper limb), G56.11 (Other lesions of median nerve, right upper limb), G56.81 (Other specified mononeuropathies of right upper limb), G58.0 (Intercostal neuropathy), G59 (Mononeuropathy in diseases classified elsewhere), G60-G65 (Polyneuropathies and other disorders of peripheral nervous system code block), G81 (Hemiplegia and hemiparesis category), G81.93 (Hemiplegia, unspecified affecting right nondominant side), G81.90 (Hemiplegia, unspecified affecting unspecified side), G81.94 (Hemiplegia, unspecified affecting left nondominant side), G81.14 (Spastic hemiplegia affecting left nondominant side), G81.10 (Spastic hemiplegia affecting unspecified side), G81.12 (Spastic hemiplegia affecting left dominant side), G83 (Other paralytic syndromes category), G92 (Toxic encephalopathy category), G92.0 (Immune effector cell-associated neurotoxicity syndrome category), G92.8 (Other toxic encephalopathy), G92.9 (Unspecified toxic encephalopathy), G97 (Intraoperative and postprocedural complications and disorders of nervous system category), I63.9 (Cerebral infarction, unspecified), F10.10 (Alcohol abuse, uncomplicated), Z18.9 (Retained foreign body fragments, unspecified material), G80.9 (Cerebral palsy, unspecified), J06.9 (Acute upper respiratory infection, unspecified), F02.C11 (Dementia in other diseases classified elsewhere, severe, with agitation), F02.811 (Dementia in other diseases classified elsewhere, unspecified severity, with agitation), F03.C11 (Unspecified dementia, severe, with agitation), F02.C18 (Dementia in other diseases classified elsewhere, severe, with other behavioral disturbance), G51.0 (Bell’s palsy), G89.29 (Other chronic pain), M54.9 (Dorsalgia, unspecified)

Topics Covered: ICD-10-CM nervous system coding, ICD-10-CM Chapter 6 coding, diseases of the nervous system, neurological diagnosis coding, nervous system anatomy, central nervous system, peripheral nervous system, autonomic nervous system, somatic nervous system, neurons, neuroglia, glia cells, glioma, brain anatomy, meninges, brainstem, midbrain, pons, medulla oblongata, cerebellum, diencephalon, hypothalamus, thalamus, epithalamus, cerebrum, spinal cord anatomy, spinal nerves, vertebral segments, cervical nerves, thoracic nerves, lumbar nerves, sacral nerves, coccygeal nerves, cranial nerves, trigeminal nerve, ophthalmic nerve, maxillary nerve, mandibular nerve, nerve plexus, cervical plexus, brachial plexus, lumbar plexus, sacral plexus, ICD-10-CM G codes, Excludes1 notes, Excludes2 notes, dominancy and laterality coding, hemiparesis coding, hemiplegia coding, dominant side coding, nondominant side coding, ambidextrous patient coding, etiology manifestation coding, dementia coding, Parkinson’s disease coding, Alzheimer’s disease coding, pain coding guidelines, acute pain coding, chronic pain coding, neoplasm-related pain coding, postprocedural pain coding, postoperative pain coding, pain management coding, Glasgow Coma Scale coding, GCS coding, traumatic brain injury coding, EMT documentation coding, meningitis coding, bacterial meningitis coding, viral meningitis coding, aseptic meningitis coding, unspecified meningitis coding, encephalitis coding, myelitis coding, encephalomyelitis coding, HIV meningoencephalitis coding, sequelae of inflammatory diseases of the central nervous system, Parkinson’s disease with dyskinesia, Parkinson’s disease without dyskinesia, ON episodes, OFF episodes, levodopa therapy, carbidopa therapy, Alzheimer’s disease with behavioral disturbance, dementia with agitation, dementia severity coding, alcoholic cerebellar ataxia, epilepsy coding, recurrent seizure coding, seizure disorder coding, intractable epilepsy coding, drug resistant epilepsy, treatment resistant epilepsy, poorly controlled epilepsy, refractory epilepsy, status epilepticus coding, febrile seizure coding, non-epileptic seizure coding, unspecified seizure coding, migraine coding, migraine with aura coding, status migrainosus coding, intractable migraine coding, migraine with cerebral infarction coding, cyclical vomiting coding, headache syndrome coding, transient ischemic attack coding, TIA coding, vertebro-basilar artery syndrome, transient global amnesia, amnesia coding, sleep disorder coding, obstructive sleep apnea coding, mononeuropathy coding, mononeuritis coding, neuropathy coding, carpal tunnel syndrome coding, intercostal neuropathy coding, polyneuropathy coding, Guillain-Barre syndrome, inflammatory polyneuropathy, toxic polyneuropathy, peripheral nervous system disorders, hemiplegia and hemiparesis coding, flaccid hemiplegia, spastic hemiplegia, current CVA with hemiplegia, paralytic syndrome coding, monoplegia coding, diplegia coding, cauda equina syndrome, neurogenic bladder coding, anterior cord syndrome, posterior cord syndrome, post-epileptic syndrome, toxic encephalopathy coding, toxic metabolic encephalopathy, immune effector cell-associated neurotoxicity syndrome, ICANS coding, CAR T-cell therapy complication coding, cerebral edema coding, nervous system postprocedural complications coding, intraoperative nervous system complications, Code Purple practice, Code Red assessment, nervous system coding scenarios