Short answer · Medically reviewed summary · Last updated: 2026-05-08
Laryngeal dystonia, also commonly referred to as spasmodic dysphonia, is coded under ICD-10 as G24.5 (Blepharospasm, which is often grouped with focal dystonias) or more specifically G25.89 (Other specified extrapyramidal and movement disorders). In the older ICD-9-CM classification system, laryngeal dystonia is typically categorized under 333.82 (Oromandibular dystonia) or 333.89 (Other specified extrapyramidal disease and abnormal movement disorders). What is the clinical definition of Laryngeal Dystonia? Laryngeal dystonia is a rare neurological movement disorder that causes involuntary spasms of the muscles within the vocal cords (larynx).
ICD10 code of Laryngeal Dystonia and ICD9 code
ICD-10 and ICD-9 codes for Laryngeal Dystonia, with classification details for clinicians, coders and patients.
Laryngeal dystonia, also commonly referred to as spasmodic dysphonia, is coded under ICD-10 as G24.5 (Blepharospasm, which is often grouped with focal dystonias) or more specifically G25.89 (Other specified extrapyramidal and movement disorders). In the older ICD-9-CM classification system, laryngeal dystonia is typically categorized under 333.82 (Oromandibular dystonia) or 333.89 (Other specified extrapyramidal disease and abnormal movement disorders).
What is the clinical definition of Laryngeal Dystonia?
Laryngeal dystonia is a rare neurological movement disorder that causes involuntary spasms of the muscles within the vocal cords (larynx). These spasms lead to breaks in the voice, a strained or strangled sound, or a breathy, whispery quality. While there are currently 4 community members on DiseaseMaps.org sharing their experiences with laryngeal dystonia, the condition is often under-diagnosed due to its subtle onset and similarity to other voice disorders.
How are Laryngeal Dystonia diagnosis codes used?
Medical coding for laryngeal dystonia is essential for insurance authorization and clinical tracking. Because laryngeal dystonia is a focal dystonia, clinicians sometimes utilize codes that capture the broader category of movement disorders. Accurate coding ensures that patients receive appropriate coverage for treatments, such as botulinum toxin injections, which are the gold standard for managing symptoms.
What are the primary subtypes of Laryngeal Dystonia?
Clinical specialists categorize laryngeal dystonia based on the nature of the vocal cord spasms:
- Adductor Laryngeal Dystonia: The most common form, causing vocal cords to slam shut, resulting in a strained, choked voice.
- Abductor Laryngeal Dystonia: The vocal cords pull apart, causing sudden breathy breaks and a weak, whispery voice.
- Mixed Laryngeal Dystonia: A combination of both adductor and abductor symptoms, leading to inconsistent voice quality.
Next steps
- Consult a fellowship-trained laryngologist or a movement disorder neurologist for a definitive diagnosis.
- Keep a voice diary to track how your symptoms fluctuate throughout the day.
- Connect with the 4 community members at DiseaseMaps.org to share management strategies.
- Inquire about speech-language pathology specifically trained in voice rehabilitation.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Spasmodic Dysphonia.
- Orphanet: Focal Dystonia (ORPHA: 98377).
- National Spasmodic Dysphonia Association (NSDA): Clinical Overview.
- International Classification of Diseases, 10th Revision (ICD-10-CM).
