ICD-10-CM 2027
ICD-10 code for myoclonus
From the official ICD-10-CM alphabetic index entry “Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex)”. Page updated September 29, 2026.
About coding myoclonus
The ICD-10-CM code for myoclonus is G25.3 (Myoclonus). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G25.3.
Within G25 (other extrapyramidal and movement disorders), G25.3 is specifically for myoclonus. Related codes cover essential tremor (G25.0), drug-induced tremor (G25.1), other specified forms of tremor (G25.2), drug-induced chorea (G25.4), other chorea (G25.5), drug induced tics and other tics of organic origin (G25.6), other and unspecified drug induced movement disorders (G25.7), other specified extrapyramidal and movement disorders (G25.8) and 1 more.
Don't report G25.3 together with the conditions in its Excludes1 note: facial myokymia (G51.4) and myoclonic epilepsy (G40.-).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
More specific myoclonus codes (official index)
- drug-induced G25.3 — Myoclonus
- epilepsy G40.4 — Other generalized epilepsy and epileptic syndromes
- familial (progressive)
- Lafora
- epileptica G40.409 — Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
- with status epilepticus G40.401 — Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus
- facial G51.3 — Clonic hemifacial spasm
- familial progressive G25.3 — Myoclonus
- epilepsy
- Friedreich's G25.3 — Myoclonus
- jerks G25.3 — Myoclonus
- massive G25.3 — Myoclonus
- palatal G25.3 — Myoclonus
- pharyngeal G25.3 — Myoclonus
Don't confuse with (Excludes1 for G25.3)
Common questions about myoclonus ICD-10 codes
What is the ICD-10 code for myoclonus?
- G25.3 — Myoclonus. More specific codes apply when the documentation supports them: G25.3, G40.4, G40.409, G40.401 and others below.
What is the ICD-10 code for drug-induced myoclonus?
- G25.3 — Myoclonus.
What is the ICD-10 code for epilepsy myoclonus?
- G40.4 — Other generalized epilepsy and epileptic syndromes (header code; choose a more specific subcode).
What is the ICD-10 code for epileptica myoclonus?
- G40.409 — Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus.
What is the ICD-10 code for facial myoclonus?
- G51.3 — Clonic hemifacial spasm (header code; choose a more specific subcode).
What is the ICD-10 code for familial progressive myoclonus?
- G25.3 — Myoclonus.
What is the ICD-10 code for friedreich's myoclonus?
- G25.3 — Myoclonus.
Is G25.3 billable?
- Yes. G25.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G25.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G25.3 as a principal diagnosis.
Is G25.3 a CC or MCC?
- No. G25.3 is neither a CC nor an MCC under MS-DRG v44.0.