Malignant neoplasm of floor of mouth, part unspecified

This code signifies a cancerous growth originating in the floor of the mouth, where the specific sub-site within the floor of the mouth is not documented. It represents an undifferentiated or unspecified malignant tumor in this anatomical region.

Use this code when documentation confirms a primary malignant neoplasm of the floor of the mouth, but lacks further specificity regarding the exact location (e.g., anterior, lateral). This code is appropriate when the physician's diagnosis explicitly states "malignant neoplasm of floor of mouth, unspecified."

• Always seek clarification from the provider if a more specific site within the floor of the mouth (e.g., anterior floor of mouth) is indicated in the clinical notes, as more precise codes exist.
• Do not use this code if the malignancy extends beyond the floor of the mouth or if it's a secondary (metastatic) tumor; use appropriate codes for those scenarios.
• Remember to also code any associated signs, symptoms, or complications, as well as the patient's tobacco and alcohol use history, if documented.