Short answer · Medically reviewed summary · Last updated: 2026-05-08
Idiopathic Subglottic Stenosis (ISS) does not have a unique, dedicated ICD-10 or ICD-9 code; instead, it is typically classified under broader codes for tracheal or laryngeal stenosis. Clinicians generally use ICD-10 code J38.6 (Stenosis of larynx, subglottic) or J39.8 (Other specified diseases of upper respiratory tract) to document this condition. What is Idiopathic Subglottic Stenosis? Idiopathic Subglottic Stenosis is a rare, fibro-proliferative disease characterized by the narrowing of the airway just below the vocal cords.
ICD10 code of Idiopathic Subglottic Stenosis and ICD9 code
ICD-10 and ICD-9 codes for Idiopathic Subglottic Stenosis, with classification details for clinicians, coders and patients.
Idiopathic Subglottic Stenosis (ISS) does not have a unique, dedicated ICD-10 or ICD-9 code; instead, it is typically classified under broader codes for tracheal or laryngeal stenosis. Clinicians generally use ICD-10 code J38.6 (Stenosis of larynx, subglottic) or J39.8 (Other specified diseases of upper respiratory tract) to document this condition.
What is Idiopathic Subglottic Stenosis?
Idiopathic Subglottic Stenosis is a rare, fibro-proliferative disease characterized by the narrowing of the airway just below the vocal cords. While it is labeled "idiopathic," meaning the cause is unknown, it predominantly affects adult women, with recent research exploring potential links to hormonal factors, gastroesophageal reflux (GERD), and autoimmune dysregulation. Because Idiopathic Subglottic Stenosis is so rare, patients often face a long diagnostic journey before receiving an accurate classification.
How are ICD codes applied for this condition?
In medical billing and clinical documentation, Idiopathic Subglottic Stenosis is captured using codes that reflect the anatomical location of the airway obstruction. Because the condition is progressive and often requires repeated interventions, accurate coding is vital for insurance coverage and longitudinal care:
- ICD-10-CM: J38.6 (Stenosis of larynx, subglottic).
- ICD-9-CM: 478.74 (Stenosis of larynx).
- Clinical Note: Physicians may also use secondary codes to identify associated conditions like GERD or laryngopharyngeal reflux (LPR) that may exacerbate Idiopathic Subglottic Stenosis.
Why is early diagnosis of Idiopathic Subglottic Stenosis important?
The clinical presentation of Idiopathic Subglottic Stenosis often mimics asthma, leading to frequent misdiagnoses. Early identification via laryngoscopy or bronchoscopy is essential to manage the narrowing before it causes significant respiratory distress. Our community at DiseaseMaps.org currently supports 3 individuals navigating the complexities of Idiopathic Subglottic Stenosis, highlighting the importance of sharing lived experiences to aid others in finding specialized care.
Next steps
- Consult an otolaryngologist (ENT) with sub-specialization in laryngology to confirm your diagnosis.
- Request a copy of your pathology and imaging reports to ensure your medical records accurately reflect the subglottic location.
- Join the Idiopathic Subglottic Stenosis community on DiseaseMaps.org to connect with others who understand the diagnostic challenges of this rare condition.
Medical disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD)
- Orphanet: Rare disease database
- American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
- PubMed: Clinical reviews on subglottic airway stenosis
