ICD-10 Code C30.0 – Malignant neoplasm of nasal cavity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C30.0 – Malignant neoplasm of nasal cavity
What it is
C30.0 identifies a malignant tumor arising in the nasal cavity. Use it when documentation confirms a primary cancer in the nasal passages, not a sinus or nasopharyngeal site.
Clinical signs
Common findings include persistent nasal obstruction, recurrent epistaxis, and a visible or endoscopic mass. Clinical features vary; refer to documentation for the exact site and pathology.
When to use this code
Use C30.0 when the record states malignant neoplasm of the nasal cavity, including a confirmed primary lesion in the nasal passages. It is appropriate for oncology, ENT, and pathology documentation that clearly localizes the tumor. Check documentation if the site is described as nasal sinus, septum, or nasopharynx instead.
Do not use for
Do not use this code for malignant neoplasms of the paranasal sinuses, nasal septum, or nasopharynx. If the site is unclear or another anatomic location is documented, code the documented site instead.
Coding tip
Verify the exact anatomic site in the pathology or operative note before assigning C30.0.