ICD-10 Code C10.2 – Malignant neoplasm of lateral wall of oropharynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C10.2 – Malignant neoplasm of lateral wall of oropharynx
What it is
This code identifies a malignant tumor arising in the lateral wall of the oropharynx, the side portion of the throat behind the mouth. Use it when documentation specifies that exact anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings may include a throat mass, pain, dysphagia, odynophagia, or referred ear pain, but you should code only what is documented.
When to use this code
Use C10.2 when the provider documents primary cancer of the lateral wall of the oropharynx. It may appear in pathology, oncology, or operative notes when the site is clearly stated. If the record only says “oropharyngeal cancer,” check documentation for the specific subsite.
Do not use for
Do not use this code for cancers of the tonsil, base of tongue, soft palate, or other oropharyngeal sites. If the lesion is metastatic or the site is uncertain, check documentation.
Coding tip
Assign the code only when the lateral wall subsite is explicitly documented; otherwise, query for clarification.