ICD-10-CM Alphabetic Index · FY 2026 15 Entries
Myoclonus in the ICD-10-CM Index ICD-10-CM
The main term Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) carries 15 index entries pointing to 5 ICD-10-CM codes. The default entry is G25.3, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
15
Index Entries
5
Codes Referenced
G25.3
Default Code
M
Letter
15 of 15 shown
ICD-10-CM
Index Entries Under Myoclonus 15 entries · 5 codes
Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex) G25.3
drug-induced G25.3
familial (progressive) see Epilepsy, myoclonus
Lafora see Epilepsy, myoclonus, progressive, Lafora
epileptica G40.409 see also Epilepsy, myoclonus
with status epilepticus G40.401
facial G51.3 Non-billable
familial progressive G25.3
epilepsy see Epilepsy, myoclonus, progressive
Friedreich's G25.3
jerks G25.3
massive G25.3
palatal G25.3
pharyngeal G25.3
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
