143 Malignant neoplasm of gum 
143.0 Malignant neoplasm of upper gum convert 143.0 to ICD-10-CM 143.1 Malignant neoplasm of lower gum convert 143.1 to ICD-10-CM 143.8 Malignant neoplasm of other sites of gum convert 143.8 to ICD-10-CM
143.9 Malignant neoplasm of gum unspecified convert 143.9 to ICD-10-CM