2024 ICD-10-CM Diagnosis Code G25.3

Myoclonus

ICD-10-CM Code:
G25.3
ICD-10 Code for:
Myoclonus
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

Code Classification

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

G25.3 is a billable diagnosis code used to specify a medical diagnosis of myoclonus. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

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

  • Autoimmune generalized polymyoclonus
  • Autoimmune movement disorder
  • Autoimmune opsoclonus myoclonus
  • 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
  • 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
  • Myoclonic disorder due to dementia
  • Myoclonic disorder due to hepatic failure
  • Myoclonic disorder due to mitochondrial disorder
  • Myoclonic disorder due to neuronal ceroid lipofuscinosis
  • Myoclonic disorder due to sialidosis
  • Myoclonus
  • Myoclonus associated with fever
  • Myoclonus of tensor tympani muscle
  • Myoclonus, cerebellar ataxia, deafness syndrome
  • Neural hearing loss
  • Nocturnal myoclonus
  • Nocturnal myoclonus
  • Non-epileptic myoclonus
  • Oculopalatal myoclonus
  • Opsoclonus-myoclonus syndrome
  • Opsoclonus-myoclonus syndrome
  • Opsoclonus-myoclonus syndrome
  • Palatal myoclonus
  • Palatal-tympanic myoclonus
  • Paramyoclonus multiplex
  • Paraneoplastic myoclonus
  • Paraneoplastic opsoclonus myoclonus syndrome
  • Pendular nystagmus
  • Photomyoclonus, diabetes mellitus, deafness, nephropathy and cerebral dysfunction
  • Post-anoxic myoclonus
  • Postencephalitic myoclonus
  • Progressive cerebellar ataxia with palatal myoclonus
  • Propriospinal myoclonus at sleep onset
  • Propriospinal myoclonus at sleep onset in infancy
  • 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 Classification

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.
  • 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)
  • 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)
  • 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.
  • 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).
  • 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)
  • 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.
  • 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)
  • 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)
  • Intellectual Disability

    subnormal intellectual functioning which originates during the developmental period. this has multiple potential etiologies, including genetic defects and perinatal insults. intelligence quotient (iq) scores are commonly used to determine whether an individual has an intellectual disability. iq scores between 70 and 79 are in the borderline range. scores below 67 are in the disabled range. (from joynt, clinical neurology, 1992, ch55, p28)
  • Myoclonus

    a rapid, involuntary jerk of a muscle or group of muscles.
  • Opsoclonus Myoclonus Syndrome|Opsoclonus-Myoclonus Syndrome

    a combination of opsoclonus (involuntary conjugate eye movements of large amplitude) and myoclonic jerks. this can be a paraneoplastic syndrome (a result of brain metastasis) or post-infectious (viral encephalitis).
  • Progressive Myoclonus Epilepsy

    a rare group of disorders characterized by the development of myoclonic and tonic-clonic epileptic seizures associated with progressive degeneration of the nervous system.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


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 References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert G25.3 to ICD-9-CM

  • ICD-9-CM Code: 333.2 - Myoclonus

Patient Education


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.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.