144 Malignant neoplasm of floor of mouth 
144.0 Malignant neoplasm of anterior portion of floor of mouth convert 144.0 to ICD-10-CM 144.1 Malignant neoplasm of lateral portion of floor of mouth convert 144.1 to ICD-10-CM 144.8 Malignant neoplasm of other sites of floor of mouth convert 144.8 to ICD-10-CM
144.9 Malignant neoplasm of floor of mouth, part unspecified convert 144.9 to ICD-10-CM