ICD-10 Code J34.820 – Internal nasal valve collapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J34.820 – Internal nasal valve collapse
What it is
J34.820 identifies collapse of the internal nasal valve, the narrowest part of the nasal airway. It is used when the nasal passage narrows during breathing, causing airflow limitation.
Clinical signs
Typical findings include nasal obstruction that worsens with inspiration, especially on one side or during exercise. Clinical features vary; refer to documentation for visible valve narrowing or improvement with support maneuvers.
When to use this code
Use this code when the provider documents internal nasal valve collapse as the cause of nasal obstruction. It also fits postoperative, traumatic, or structural collapse if the diagnosis is clearly stated. If the record only says “nasal obstruction,” check documentation.
Do not use for
Do not use it for general rhinitis, septal deviation, or external nasal valve problems unless internal nasal valve collapse is specifically documented. Check documentation when the cause of obstruction is unclear.
Coding tip
Code the documented anatomic site exactly; “nasal valve collapse” alone may need clarification before assignment.