| C08 | Malignant neoplasm of other and unspecified major salivary glands |
| C080 | Malignant neoplasm of submandibular gland |
| C081 | Malignant neoplasm of sublingual gland |
| C089 | Malignant neoplasm of major salivary gland, unspecified |
| C09 | Malignant neoplasm of tonsil |
| C090 | Malignant neoplasm of tonsillar fossa |
| C091 | Malignant neoplasm of tonsillar pillar (anterior) (posterior) |
| C098 | Malignant neoplasm of overlapping sites of tonsil |
| C099 | Malignant neoplasm of tonsil, unspecified |
| C10 | Malignant neoplasm of oropharynx |
| C100 | Malignant neoplasm of vallecula |
| C101 | Malignant neoplasm of anterior surface of epiglottis |
| C102 | Malignant neoplasm of lateral wall of oropharynx |
| C103 | Malignant neoplasm of posterior wall of oropharynx |
| C104 | Malignant neoplasm of branchial cleft |
| C108 | Malignant neoplasm of overlapping sites of oropharynx |
| C109 | Malignant neoplasm of oropharynx, unspecified |
| C11 | Malignant neoplasm of nasopharynx |
| C110 | Malignant neoplasm of superior wall of nasopharynx |
| C111 | Malignant neoplasm of posterior wall of nasopharynx |
| C112 | Malignant neoplasm of lateral wall of nasopharynx |
| C113 | Malignant neoplasm of anterior wall of nasopharynx |
| C118 | Malignant neoplasm of overlapping sites of nasopharynx |
| C119 | Malignant neoplasm of nasopharynx, unspecified |
| C12 | Malignant neoplasm of pyriform sinus |
| C13 | Malignant neoplasm of hypopharynx |
| C130 | Malignant neoplasm of postcricoid region |
| C131 | Malignant neoplasm of aryepiglottic fold, hypopharyngeal aspect |
| C132 | Malignant neoplasm of posterior wall of hypopharynx |
| C138 | Malignant neoplasm of overlapping sites of hypopharynx |
| C139 | Malignant neoplasm of hypopharynx, unspecified |
| C14 | Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx |
| C140 | Malignant neoplasm of pharynx, unspecified |
| C142 | Malignant neoplasm of Waldeyer's ring |
| C148 | Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx |
| C15 | Malignant neoplasm of esophagus |
| C153 | Malignant neoplasm of upper third of esophagus |
| C154 | Malignant neoplasm of middle third of esophagus |
| C155 | Malignant neoplasm of lower third of esophagus |
| C158 | Malignant neoplasm of overlapping sites of esophagus |
| C159 | Malignant neoplasm of esophagus, unspecified |
| C16 | Malignant neoplasm of stomach |
| C160 | Malignant neoplasm of cardia |
| C161 | Malignant neoplasm of fundus of stomach |
| C162 | Malignant neoplasm of body of stomach |
| C163 | Malignant neoplasm of pyloric antrum |
| C164 | Malignant neoplasm of pylorus |
| C165 | Malignant neoplasm of lesser curvature of stomach, unspecified |
| C166 | Malignant neoplasm of greater curvature of stomach, unspecified |
| C168 | Malignant neoplasm of overlapping sites of stomach |