ICD-10 Code D38.0 – Neoplasm of uncertain behavior of larynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D38.0 – Neoplasm of uncertain behavior of larynx
What it is
D38.0 identifies a laryngeal growth whose behavior is not clearly benign or malignant. Use it when documentation states uncertain behavior, borderline pathology, or an indeterminate lesion of the larynx.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a visible laryngeal mass, hoarseness, throat discomfort, or airway-related symptoms, but the code is assigned from the documented diagnosis, not symptoms alone.
When to use this code
Use D38.0 when the provider documents a neoplasm of uncertain behavior involving the larynx and the pathology or clinical impression does not confirm benign or malignant status. It also fits when the lesion is described as borderline or indeterminate. Check documentation if the site is broader than the larynx.
Do not use for
Do not use this code for clearly benign laryngeal lesions or confirmed malignant neoplasms. If the record names dysplasia, inflammation, or another specific disorder instead, code that documented condition.
Coding tip
Verify the exact anatomic site in the note, because larynx codes are not interchangeable with other upper-airway locations.