Malignant neoplasm of floor of mouth (C04)

The ICD-10 code C04 covers malignant neoplasms specifically located on the floor of the mouth, including detailed subcodes for anterior and lateral sites as well as overlapping or unspecified areas. These codes are used to document primary cancers originating in this region.

More specifically, the ICD-10 code for malignant neoplasm of the floor of mouth identifies cancers such as squamous cell carcinoma and melanoma that arise in different parts of the mouth's floor. For instance, C04.0 describes malignancies in the anterior floor, while C04.1 is used for lateral floor tumors. Both codes include synonyms like "primary carcinoma of anterior part of floor of mouth" and "primary carcinoma of lateral part of floor of mouth," aiding coders who encounter alternate terms. Code C04.8 addresses overlapping tumor sites, and C04.9 applies when the specific location within the floor of the mouth is not specified, encompassing terms like "squamous cell carcinoma of floor of mouth" and "malignant melanoma of oral cavity." These codes help healthcare providers accurately classify and report head and neck cancers involving the mouth floor.