ICD-10-CM Code G25.3


Version 2021 Billable Code

Valid for Submission

G25.3 is a billable code used to specify a medical diagnosis of myoclonus. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code G25.3 might also be used to specify conditions or terms like benign neonatal sleep myoclonus, brainstem myoclonus, brainstem myoclonus, brainstem myoclonus, brainstem myoclonus, brainstem myoclonus, etc

Short Description:Myoclonus
Long Description:Myoclonus

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G25.3:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Drug-induced myoclonus
  • Palatal myoclonus

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
  • code for adverse effect, if applicable, to identify drug T36 T50

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • facial myokymia G51.4
  • myoclonic epilepsy G40

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code G25.3 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Benign neonatal sleep myoclonus
  • Brainstem myoclonus
  • Brainstem myoclonus
  • Brainstem myoclonus
  • Brainstem myoclonus
  • Brainstem myoclonus
  • Cerebral cortex myoclonus
  • Dissociative neurological symptom disorder co-occurrent with myoclonus
  • Drug-induced myoclonus
  • Dysphonia of palatopharyngolaryngeal myoclonus
  • Eighth cranial nerve finding
  • Eyelid myoclonus with absences
  • Familial cortical myoclonus
  • Familial essential myoclonus
  • Focal myoclonus
  • Hyoid myoclonus
  • Hyperexplexia
  • Hyperexplexia
  • Hypnic jerk
  • Insomnia co-occurrent and due to nocturnal myoclonus
  • Intention myoclonus
  • Juvenile cerebellar degeneration AND myoclonus
  • Myoclonic disorder
  • Myoclonus
  • Myoclonus associated with fever
  • Myoclonus of tensor tympani muscle
  • Myoclonus, cerebellar ataxia, deafness syndrome
  • Neural hearing loss
  • Nocturnal myoclonus
  • Non-epileptic myoclonus
  • O/E - myoclonus
  • Oculopalatal myoclonus
  • Opsoclonus-myoclonus syndrome
  • Palatal myoclonus
  • Palatal-tympanic myoclonus
  • Paramyoclonus multiplex
  • Pendular nystagmus
  • Photogenic epilepsy
  • Photomyoclonus, diabetes mellitus, deafness, nephropathy and cerebral dysfunction
  • Post-anoxic myoclonus
  • Postencephalitic myoclonus
  • Progressive cerebellar ataxia with palatal myoclonus
  • Propriospinal myoclonus at sleep onset
  • Segmental cord myoclonus
  • Segmental myoclonus
  • Sleep related movement disorder
  • Spinal cord myoclonus
  • Spontaneous eye movements in coma
  • Sporadic hyperekplexia
  • Stapedial finding
  • Stapedial myoclonus
  • Symptomatic myoclonus
  • Symptomatic myoclonus
  • Vertical myoclonus

Clinical Information

  • EPILEPSIES MYOCLONIC-. a clinically diverse group of epilepsy syndromes characterized either by myoclonic seizures or by myoclonus in association with other seizure types. myoclonic epilepsy syndromes are divided into three subtypes based on etiology: familial cryptogenic and symptomatic.
  • MUCOLIPIDOSES-. a group of inherited metabolic diseases characterized by the accumulation of excessive amounts of acid mucopolysaccharides sphingolipids and/or glycolipids in visceral and mesenchymal cells. abnormal amounts of sphingolipids or glycolipids are present in neural tissue. intellectual disability and skeletal changes most notably dysostosis multiplex occur frequently. from joynt clinical neurology 1992 ch56 pp36 7
  • MYOCLONUS-. involuntary shock like contractions irregular in rhythm and amplitude followed by relaxation of a muscle or a group of muscles. this condition may be a feature of some central nervous system diseases; e.g. epilepsy myoclonic. nocturnal myoclonus is the principal feature of the nocturnal myoclonus syndrome. from adams et al. principles of neurology 6th ed pp102 3.
  • MERRF SYNDROME-. a mitochondrial encephalomyopathy characterized clinically by a mixed seizure disorder myoclonus progressive ataxia spasticity and a mild myopathy. dysarthria optic atrophy growth retardation deafness and dementia may also occur. this condition tends to present in childhood and to be transmitted via maternal lineage. muscle biopsies reveal ragged red fibers and respiratory chain enzymatic defects. from adams et al. principles of neurology 6th ed p986
  • NOCTURNAL MYOCLONUS SYNDROME-. excessive periodic leg movements during sleep that cause micro arousals and interfere with the maintenance of sleep. this condition induces a state of relative sleep deprivation which manifests as excessive daytime hypersomnolence. the movements are characterized by repetitive contractions of the tibialis anterior muscle extension of the toe and intermittent flexion of the hip knee and ankle. adams et al. principles of neurology 6th ed p387
  • MYOCLONIC EPILEPSIES PROGRESSIVE-. a heterogeneous group of primarily familial epilepsy disorders characterized by myoclonic seizures tonic clonic seizures ataxia progressive intellectual deterioration and neuronal degeneration. these include lafora disease; merrf syndrome; neuronal ceroid lipofuscinosis; sialidosis see mucolipidoses and unverricht lundborg syndrome.
  • UNVERRICHT LUNDBORG SYNDROME-. an autosomal recessive condition characterized by recurrent myoclonic and generalized seizures ataxia slowly progressive intellectual deterioration dysarthria and intention tremor. myoclonic seizures are severe and continuous and tend to be triggered by movement stress and sensory stimuli. the age of onset is between 8 and 13 years and the condition is relatively frequent in the baltic region especially finland. from menkes textbook of child neurology 5th ed pp109 110
  • PARASOMNIAS-. movements or behaviors associated with sleep sleep stages or partial arousals from sleep that may impair sleep maintenance. parasomnias are generally divided into four groups: arousal disorders sleep wake transition disorders parasomnias of rem sleep and nonspecific parasomnias. from thorpy sleep disorders medicine 1994 p191
  • OPSOCLONUS MYOCLONUS SYNDROME-. a neurological condition that is characterized by uncontrolled rapid irregular movements of the eye opsoclonus and the muscle myoclonus causing unsteady trembling gait. it is also known as dancing eyes dancing feet syndrome and is often associated with neoplasms viral infections or autoimmune disorders involving the nervous system.

Convert G25.3 to ICD-9

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Extrapyramidal and movement disorders (G20-G26)
      • Other extrapyramidal and movement disorders (G25)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients

Movement Disorders

Movement disorders are neurologic conditions that cause problems with movement, such as

  • Increased movement that can be voluntary (intentional) or involuntary (unintended)
  • Decreased or slow voluntary movement

There are many different movement disorders. Some of the more common types include

  • Ataxia, the loss of muscle coordination
  • Dystonia, in which involuntary contractions of your muscles cause twisting and repetitive movements. The movements can be painful.
  • Huntington's disease, an inherited disease that causes nerve cells in certain parts of the brain to waste away. This includes the nerve cells that help to control voluntary movement.
  • Parkinson's disease, which is disorder that slowly gets worse over time. It causes tremors, slowness of movement, and trouble walking.
  • Tourette syndrome, a condition which causes people to make sudden twitches, movements, or sounds (tics)
  • Tremor and essential tremor, which cause involuntary trembling or shaking movements. The movements may be in one or more parts of your body.

Causes of movement disorders include

  • Genetics
  • Infections
  • Medicines
  • Damage to the brain, spinal cord, or peripheral nerves
  • Metabolic disorders
  • Stroke and vascular diseases
  • Toxins

Treatment varies by disorder. Medicines can cure some disorders. Others get better when an underlying disease is treated. Often, however, there is no cure. In that case, the goal of treatment is to improve symptoms and relieve pain.

  • Angelman syndrome (Medical Encyclopedia)
  • Chronic motor tic disorder (Medical Encyclopedia)
  • Facial tics (Medical Encyclopedia)
  • Movement - uncontrollable (Medical Encyclopedia)
  • Movement - uncontrolled or slow (Medical Encyclopedia)
  • Movement - uncoordinated (Medical Encyclopedia)
  • Movement - unpredictable or jerky (Medical Encyclopedia)
  • Neurodegeneration with brain iron accumulation (NBIA) (Medical Encyclopedia)
  • Tardive dyskinesia (Medical Encyclopedia)

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