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ALL MEDICAL CODES IN CATEGORY 6 (Diseases of the Nervous System)

2025 ICD-10-CM code G44.039

Episodic paroxysmal hemicrania, not intractable. This is a rare headache disorder characterized by frequent, short-lasting, one-sided headaches with autonomic symptoms like tearing, runny nose, and sweating. The "not intractable" designation indicates the headaches respond to treatment.

2025 ICD-10-CM code G43.511

Persistent migraine aura without cerebral infarction, intractable, with status migrainosus.

2025 ICD-10-CM code G40.30

Generalized idiopathic epilepsy and epileptic syndromes, not intractable. This refers to a group of epileptic disorders caused by abnormal electrical activity on both sides of the brain, without structural abnormalities, and responsive to treatment.

2025 ICD-10-CM code G63

Polyneuropathy in diseases classified elsewhere. Code first the underlying disease.

2025 ICD-10-CM code G40.001

Focal (partial) idiopathic epilepsy with localized onset seizures, not intractable, with status epilepticus.

2025 ICD-10-CM code G43.839

Intractable menstrual migraine without status migrainosus. This refers to a severe, treatment-resistant migraine headache specifically associated with menstruation, lasting less than 72 hours.

2025 ICD-10-CM code G24.1

Genetic torsion dystonia, also known as dystonia musculorum deformans, is a neurological movement disorder characterized by involuntary muscle contractions causing twisting and repetitive movements or abnormal postures.

2025 ICD-10-CM code G40.109

Focal (partial) symptomatic epilepsy with simple partial seizures, responsive to treatment, without status epilepticus.

2025 ICD-10-CM code G25.1

Drug-induced tremor. Use additional code to identify the drug that caused the condition.

2025 ICD-10-CM code G31.0

Frontotemporal dementia

2025 ICD-10-CM code G93.89

Other specified disorders of brain. This code is used when the provider documents a brain disorder not specifically described by another code.

2025 ICD-10-CM code G43.101

Migraine with aura, not intractable, with status migrainosus.

2025 ICD-10-CM code G40.21

Intractable focal (partial) epilepsy with complex partial seizures.

2025 ICD-10-CM code G47.13

Recurrent hypersomnia, including Kleine-Levin syndrome and menstrual-related hypersomnia.

2025 ICD-10-CM code G44.091

Other intractable trigeminal autonomic cephalgias (TACs) are headache syndromes that don't respond to treatment. They cause one-sided head or facial pain, along with symptoms like tearing, eye redness, or a droopy eyelid.

2025 ICD-10-CM code G40.804

Other epilepsy, intractable, without status epilepticus. This condition involves seizures that are not controlled with treatment and do not last longer than 5 minutes.

2025 ICD-10-CM code G96.81

Intracranial hypotension. This condition involves low cerebrospinal fluid pressure within the skull.

2025 ICD-10-CM code G40.A11

Intractable absence epileptic syndrome with status epilepticus. This involves seizures characterized by staring spells or altered consciousness occurring so frequently that there appears to be no interval between them, and are unresponsive to treatment.

2025 ICD-10-CM code G43.9

Migraine, unspecified. This code is used when the provider doesn't specify the type of migraine (with or without aura, intractable or not intractable, with or without status migrainosus).

2025 ICD-10-CM code G43.5

Persistent migraine aura without cerebral infarction. This condition involves aura symptoms lasting for more than a week without evidence of stroke on brain imaging.

2025 ICD-10-CM code G44.01

Episodic cluster headache. Characterized by severe, sharp, burning pain in or around the eye or one side of the head, often accompanied by eye watering, redness, and/or drooping eyelids on the affected side.

2025 ICD-10-CM code G56.41

Causalgia of the right upper limb. This condition involves prolonged severe pain, changes in skin color or temperature, and swelling, typically following injury to the central or peripheral nervous system.

2025 ICD-10-CM code G47.21

Delayed sleep phase type circadian rhythm sleep disorder. Characterized by a sleep cycle delay of 2 or more hours beyond a reasonable bedtime.

2025 ICD-10-CM code G43.611

Persistent migraine aura with cerebral infarction, intractable, with status migrainosus. This condition involves a persistent migraine aura accompanied by a stroke (cerebral infarction) and prolonged severe headache, all unresponsive to treatment.

2025 ICD-10-CM code G92.00

Immune effector cell-associated neurotoxicity syndrome (ICANS), grade unspecified. This condition arises as a complication of immune effector cell therapy.

2025 ICD-10-CM code G40.3

Generalized idiopathic epilepsy and epileptic syndromes.Consider also MERRF syndrome (E88.42), if applicable.

2025 ICD-10-CM code G43.411

Intractable hemiplegic migraine with status migrainosus.

2025 ICD-10-CM code G43.01

Intractable migraine without aura. This refers to a severe, recurrent headache that is typically one-sided, often accompanied by nausea, vomiting, and sensitivity to light.It is not preceded by aura and is poorly controlled by standard treatments.

2025 ICD-10-CM code G40.B09

Juvenile myoclonic epilepsy, not intractable, without status epilepticus

2025 ICD-10-CM code G40.909

Unspecified epilepsy, not intractable, without status epilepticus. This refers to recurrent seizures that are controlled with treatment and last less than 5 minutes.

2025 ICD-10-CM code G44.8

Other specified headache syndromes

2025 ICD-10-CM code G60

Hereditary and idiopathic neuropathy encompasses a group of disorders affecting the peripheral nervous system. These conditions, either inherited or of unknown cause, impact the extremities, leading to symptoms like numbness, pain, and weakness.

2025 ICD-10-CM code G61.81

Chronic inflammatory demyelinating polyneuritis (CIDP) is a rare autoimmune disorder causing progressive muscle weakness, numbness, and other symptoms due to peripheral nerve inflammation and demyelination.

2025 ICD-10-CM code G62.0

Drug-induced polyneuropathy. Use an additional code for adverse effect, if applicable, to identify the drug (T36-T50 with fifth or sixth character 5).

2025 ICD-10-CM code G61.1

Serum neuropathy. Use additional code for adverse effect, if applicable, to identify serum (T50.-).

2025 ICD-10-CM code G93.7

Reye's syndrome. Code first poisoning due to salicylates, if applicable (T39.0-, with sixth character 1-4). Use additional code for adverse effect due to salicylates, if applicable (T39.0-, with sixth character 5).

2025 ICD-10-CM code G98

This code encompasses other disorders of the nervous system that are not classified elsewhere.

2025 ICD-10-CM code G96.1

Disorders of meninges, not elsewhere classified.

2025 ICD-10-CM code G90.51

Complex regional pain syndrome I (CRPS I) of an upper limb.

2025 ICD-10-CM code G58.9

Mononeuropathy, unspecified. This code is used when a single nerve is damaged but the provider doesn't specify which nerve is affected.

2025 ICD-10-CM code G70.80

Lambert-Eaton syndrome, unspecified. This code is used when the type of Lambert-Eaton myasthenic syndrome (LEMS) is not specified in the documentation.

2025 ICD-10-CM code G65.1

Sequelae of other inflammatory polyneuropathy. This code is used for conditions that occur after the acute phase of inflammatory polyneuropathy, other than Guillain-Barre syndrome, has resolved.

2025 ICD-10-CM code G92.02

Immune effector cell-associated neurotoxicity syndrome, grade 2 (ICANS, grade 2).

2025 ICD-10-CM code G61

Inflammatory polyneuropathy is a neurological condition characterized by inflammation affecting multiple peripheral nerves.

2025 ICD-10-CM code G97.32

Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a procedure, other than a nervous system procedure.

2025 ICD-10-CM code G92.03

Immune effector cell-associated neurotoxicity syndrome, grade 3.

2025 ICD-10-CM code G96.819

Other intracranial hypotension. This code is used for cases of low cerebrospinal fluid pressure within the skull that are not spontaneous.

2025 ICD-10-CM code G57.53

Tarsal tunnel syndrome of bilateral lower limbs.

2025 ICD-10-CM code G92.01

Immune effector cell-associated neurotoxicity syndrome (ICANS), grade 1.

2025 ICD-10-CM code G57.62

Lesion of plantar nerve, left lower limb. This refers to damage or dysfunction of the plantar nerve in the left foot, often causing pain, numbness, or tingling.