| D13 | Benign neoplasm of other and ill-defined parts of digestive system | NON-BILLABLE CODE |
| D13.0 | Benign neoplasm of esophagus | BILLABLE CODE |
| D13.1 | Benign neoplasm of stomach | BILLABLE CODE |
| D13.2 | Benign neoplasm of duodenum | BILLABLE CODE |
| D13.3 | Benign neoplasm of other and unspecified parts of small intestine | NON-BILLABLE CODE |
| D13.30 | Benign neoplasm of unspecified part of small intestine | BILLABLE CODE |
| D13.39 | Benign neoplasm of other parts of small intestine | BILLABLE CODE |
| D13.4 | Benign neoplasm of liver | BILLABLE CODE |
| D13.6 | Benign neoplasm of pancreas | BILLABLE CODE |
| D13.7 | Benign neoplasm of endocrine pancreas | BILLABLE CODE |
| D13.9 | Benign neoplasm of ill-defined sites within the digestive system | NON-BILLABLE CODE |
| D13.91 | Familial adenomatous polyposis | BILLABLE CODE |
| D13.99 | Benign neoplasm of ill-defined sites within the digestive system | BILLABLE CODE |
