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

Yes. G25.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G25.3 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).

What cannot be coded together with G25.3?

G25.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G25.3

G25.3 — Myoclonus

Billable / specific codeICD-10-CM

G25.3 is a billable, specific ICD-10-CM code for myoclonus. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Use additional code

Add a secondary code to capture the detail described below.

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

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Drug-induced myoclonus
Palatal myoclonus

Risk adjustment

G25.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

G25.3 is named in 17 Medicare coverage policies — 17 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A54969Billing and Coding: Nerve Conduction Studies and Electromyography
A56612Billing and Coding: CT of the Head
A56619Billing and Coding: Nerve Conduction Studies and Electromyography

How G25.3 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G25.3.

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

Related codes at this level

Codes that share G25. If G25.3 is not quite right, the correct code is usually one of these.

Questions about G25.3

Is G25.3 a billable ICD-10-CM code?: Yes. G25.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G25.3 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).
What cannot be coded together with G25.3?: G25.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.