Malignant neoplasm of posterior wall of oropharynx

This code signifies the presence of a cancerous tumor originating from the posterior wall of the oropharynx. This area is located behind the oral cavity and extends to the epiglottis, playing a role in both breathing and swallowing. The malignancy indicates uncontrolled cell growth requiring medical intervention.

Use this code when documentation clearly identifies a primary malignant neoplasm specifically located on the posterior wall of the oropharynx. This diagnosis is typically established through biopsy and confirmed by pathology reports. It is appropriate for initial diagnosis, treatment planning, and follow-up care for this specific cancer.

• Ensure the documentation specifies "posterior wall" of the oropharynx; other oropharyngeal subsites have different codes.
• Distinguish this from benign neoplasms or carcinoma in situ of the same site.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition dictates otherwise per coding guidelines.