ICD-10-CM 2027
ICD-10 code for idiopathic dystonia
From the official ICD-10-CM alphabetic index entry “Dystonia › idiopathic”. Page updated September 29, 2026.
About coding idiopathic dystonia
The ICD-10-CM code for idiopathic dystonia is G24.1 (Genetic torsion dystonia). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G24.1.
Within G24 (dystonia), G24.1 is specifically for genetic torsion dystonia. Related codes cover drug induced dystonia (G24.0), idiopathic nonfamilial dystonia (G24.2), Spasmodic torticollis (G24.3), idiopathic orofacial dystonia (G24.4), Blepharospasm (G24.5), other dystonia (G24.8) and unspecified (G24.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 056 (Degenerative Nervous System Disorders with MCC, relative weight 2.2655) and DRG 057 (Degenerative Nervous System Disorders without MCC, relative weight 1.2838), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific idiopathic dystonia codes (official index)
Common questions about idiopathic dystonia ICD-10 codes
What is the ICD-10 code for idiopathic dystonia?
- G24.1 — Genetic torsion dystonia. More specific codes apply when the documentation supports them: G24.1, G24.2, G24.4.
What is the ICD-10 code for familial idiopathic dystonia?
- G24.1 — Genetic torsion dystonia.
What is the ICD-10 code for nonfamilial idiopathic dystonia?
- G24.2 — Idiopathic nonfamilial dystonia.
What is the ICD-10 code for orofacial idiopathic dystonia?
- G24.4 — Idiopathic orofacial dystonia.
Is G24.1 billable?
- Yes. G24.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G24.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G24.1 as a principal diagnosis.
Is G24.1 a CC or MCC?
- No. G24.1 is neither a CC nor an MCC under MS-DRG v44.0.