G25.3 Myoclonus

Billable ICD-10-CM code, FY2026.

Applicable to

• Drug-induced myoclonus
• Palatal myoclonus

Excludes1 (never 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)

Applies from G25 Other extrapyramidal and movement disorders

Excludes2 (not included here)

• sleep related movement disorders (G47.6-)

MS-DRG index

Defines the logic of DRG(s) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 333.2 Myoclonus

Code annotations containing back-references to G25.3

Back-references to G25

• Type 2 Excludes: F98.4 Stereotyped movement disorders ("movement disorders of organic origin (G20-G25)")
• Type 1 Excludes: R25 Abnormal involuntary movements ("specific movement disorders (G20-G26)")

Diagnosis Index entries for G25.3

• Convulsions (idiopathic) › myoclonic
• Disease, diseased › Friedreich's › myoclonia
• Jerks, myoclonic
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex)
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › drug-induced
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › familial progressive
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › Friedreich's
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › jerks
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › massive
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › palatal
• Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) › pharyngeal
• Paramyoclonus multiplex

Nearby codes

• G25 Other extrapyramidal and movement disorders
• G25.0 Essential tremor
• G25.1 Drug-induced tremor
• G25.2 Other specified forms of tremor
• G25.3 Myoclonus (this code)
• G25.4 Drug-induced chorea
• G25.5 Other chorea
• G25.6 Drug induced tics and other tics of organic origin
• G25.61 Drug induced tics
• G25.69 Other tics of organic origin