ICD-10-CM > C00-D49 > C00-C14 > C06 > C06.1 C06.1 Malignant neoplasm of vestibule of mouth Billable/Specific Copy Code Copy Description Applicable To Malignant neoplasm of buccal sulcus (upper) (lower)Malignant neoplasm of labial sulcus (upper) (lower)