Malignant neoplasm of lateral wall of oropharynx

This diagnosis code signifies a primary cancerous tumor originating from the lateral wall of the oropharynx. This area includes structures such as the tonsillar fossae and the lateral pharyngeal wall. The malignancy is characterized by uncontrolled cell growth and has the potential to invade surrounding tissues or metastasize.

Utilize this code when documentation explicitly states a malignant neoplasm located on the lateral wall of the oropharynx. This is typically supported by pathology reports confirming malignancy and imaging studies or endoscopic findings detailing the tumor's precise location. It applies to newly diagnosed cases as well as active treatment or surveillance for this specific site.

• Ensure documentation specifies "lateral wall" of the oropharynx; avoid using for other oropharyngeal subsites.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless a complication of the neoplasm is being treated.
• Confirm laterality if specified in the documentation (e.g., left, right, bilateral), although this code does not differentiate laterality.