U.S. ICD-10-CM · FY 2027

G25.3 ICD-10-CM Code: Myoclonus

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

G25.3

Myoclonus

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where G25.3 sits

  1. 1

    Chapter 6

    Diseases of the nervous system (G00-G99)

  2. 2

    Section

    Extrapyramidal and movement disorders (G20-G26)

  3. 3

    Category G25

    Other extrapyramidal and movement disorders

  4. 4

    Code G25.3

    Myoclonus

Documentation details

Notes for this code

Inclusion terms

  • Drug-induced myoclonus
  • Palatal myoclonus

Code first

No “code first” instruction is listed for G25.3.

Use additional code

  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Excludes1

Conditions that should not be reported together with this code.

  • facial myokymia (G51.4)
  • myoclonic epilepsy (G40.-)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for G25.3.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code G25.3 mean?

G25.3 is the FY 2027 U.S. ICD-10-CM code for “Myoclonus.”

Is G25.3 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, G25.3 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is G25.3 located in ICD-10-CM?

G25.3 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Extrapyramidal and movement disorders (G20-G26) (G20–G26), under category G25, Other extrapyramidal and movement disorders.

What coding notes are listed for G25.3?

Its listed inclusion terms are Drug-induced myoclonus; Palatal myoclonus. No code-first instruction is listed. Additional-code instructions: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). Excludes1 notes: facial myokymia (G51.4); myoclonic epilepsy (G40.-). No Excludes2 note is listed.

Keep exploring

Related G25 codes

G25.0

Essential tremor

G25.1

Drug-induced tremor

G25.2

Other specified forms of tremor

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