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ICD10BillableValid for clinical use

ICD-10 Code G25.3: Myoclonus

G25.3 is a billable ICD-10 diagnosis code used to classify Myoclonus in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

  • May be used when a clinician documents myoclonus in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
6Diseases of the nervous system (G00-G99)
block
G20-G26Extrapyramidal and movement disorders
category
G25Other extrapyramidal and movement disorders
currentG25

Official coding notes

Inclusion terms
  • Drug-induced myoclonus
  • Palatal myoclonus
Applicable to
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excludes1 (do not code together)
  • facial myokymia (G51.4)
  • myoclonic epilepsy (G40.-)
Use additional code
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

NeurologistGeneral Physician

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
G25.3

Common synonyms

Myoclonus

Frequently asked questions

Code details

CodeG25.3
SystemICD10
Display nameMyoclonus
ChapterDiseases of the nervous system (G00-G99)
BlockExtrapyramidal and movement disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Convulsions(idiopathic)Disease, diseasedJerks, myoclonicMyoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Myoclonus, myoclonic, myoclonia(familial) (essential) (multifocal) (simplex)Paramyoclonus multiplex

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code G25.3 for Myoclonus | HealthAssure