Malignant neoplasm of cheek mucosa

This code signifies a primary cancerous tumor originating in the mucous membrane lining the inside of the cheek. This malignancy is an oral cavity cancer, specifically affecting the buccal mucosa.

Apply this code when documentation clearly indicates a confirmed diagnosis of a primary malignant neoplasm of the cheek mucosa. Supporting documentation typically includes pathology reports confirming malignancy and the specific site, or physician notes detailing the diagnosis and location.

• Ensure the documentation specifies "malignant" and not a benign or uncertain neoplasm.
• Verify the exact location is the "cheek mucosa" and not another oral cavity site like the gum or lip.
• Sequence this code as the primary diagnosis when it is the reason for the encounter or treatment.