ICD-10 Code D02.0 – Carcinoma in situ of larynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D02.0 – Carcinoma in situ of larynx
What it is
D02.0 identifies carcinoma in situ of the larynx, a preinvasive malignant epithelial lesion confined to the surface layer. It has not invaded deeper tissue, so you should code it when documentation confirms in situ disease.
Clinical signs
Clinical features vary; refer to documentation. Patients may have hoarseness, throat discomfort, or an abnormal laryngeal lesion seen on laryngoscopy, but diagnosis depends on pathology confirming carcinoma in situ.
When to use this code
Use D02.0 when the record states carcinoma in situ, severe dysplasia, or an equivalent pathologic diagnosis of the larynx. Code it for confirmed noninvasive lesions of the vocal cords or other laryngeal sites when specified. Check documentation if the site or invasion status is unclear.
Do not use for
Do not use this code for invasive laryngeal cancer, benign vocal cord lesions, or dysplasia without in situ wording. If the pathology is uncertain, check documentation before assigning D02.0.
Coding tip
Verify both the anatomic site and the “in situ” wording in the pathology or provider note before coding.