| C78 | Secondary malignant neoplasm of respiratory and digestive organs | NON-BILLABLE CODE |
| C78.0 | Secondary malignant neoplasm of lung | NON-BILLABLE CODE |
| C78.00 | Secondary malignant neoplasm of unspecified lung | BILLABLE CODE |
| C78.01 | Secondary malignant neoplasm of right lung | BILLABLE CODE |
| C78.02 | Secondary malignant neoplasm of left lung | BILLABLE CODE |
| C78.1 | Secondary malignant neoplasm of mediastinum | BILLABLE CODE |
| C78.2 | Secondary malignant neoplasm of pleura | BILLABLE CODE |
| C78.3 | Secondary malignant neoplasm of other and unspecified respiratory organs | NON-BILLABLE CODE |
| C78.30 | Secondary malignant neoplasm of unspecified respiratory organ | BILLABLE CODE |
| C78.39 | Secondary malignant neoplasm of other respiratory organs | BILLABLE CODE |
| C78.4 | Secondary malignant neoplasm of small intestine | BILLABLE CODE |
| C78.5 | Secondary malignant neoplasm of large intestine and rectum | BILLABLE CODE |
| C78.6 | Secondary malignant neoplasm of retroperitoneum and peritoneum | BILLABLE CODE |
| C78.7 | Secondary malignant neoplasm of liver and intrahepatic bile duct | BILLABLE CODE |
| C78.8 | Secondary malignant neoplasm of other and unspecified digestive organs | NON-BILLABLE CODE |
| C78.80 | Secondary malignant neoplasm of unspecified digestive organ | BILLABLE CODE |
