ICD-10 Code C11.3 – Malignant neoplasm of anterior wall of nasopharynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C11.3 – Malignant neoplasm of anterior wall of nasopharynx
What it is
This code identifies a malignant tumor arising in the anterior wall of the nasopharynx, the upper part of the throat behind the nose. Use it when documentation specifies this exact anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include nasal obstruction, epistaxis, or a nasopharyngeal mass confirmed by examination or imaging.
When to use this code
Use C11.3 when the provider documents a primary cancer of the anterior nasopharyngeal wall. Apply it for pathology, imaging, or specialist notes that clearly localize the malignancy to this site.
Do not substitute a broader nasopharyngeal cancer code if the record names the anterior wall specifically. If the site is unclear or described differently, check documentation before coding.
Do not use for
Do not use this code for benign tumors, inflammatory lesions, or cancers of other nasopharyngeal walls. Check documentation if the site is unspecified or another head and neck location is listed.
Coding tip
Code the exact anatomic site only when it is explicitly documented; otherwise, query or use the unspecified site code if supported.