ICD-10-CM > C00-D49 > C00-C14 > C06 C06 Malignant neoplasm of other and unspecified parts of mouth Non-Billable/Non-Specific Use Additional code to identify:alcohol abuse and dependence (F10.-)history of tobacco dependence (Z87.891)tobacco dependence (F17.-)tobacco use (Z72.0) Codes C06.0Malignant neoplasm of cheek mucosaC06.1Malignant neoplasm of vestibule of mouthC06.2Malignant neoplasm of retromolar areaC06.8Malignant neoplasm of overlapping sites of other and unspecified parts of mouthC06.80Malignant neoplasm of overlapping sites of unspecified parts of mouthC06.89Malignant neoplasm of overlapping sites of other parts of mouthC06.9Malignant neoplasm of mouth, unspecified