| N80.50 | Endometriosis of intestine, unspecified | BILLABLE CODE |
| N80.51 | Endometriosis of the rectum | NON-BILLABLE CODE |
| N80.511 | Superficial endometriosis of the rectum | BILLABLE CODE |
| N80.512 | Deep endometriosis of the rectum | BILLABLE CODE |
| N80.519 | Endometriosis of the rectum, unspecified depth | BILLABLE CODE |
| N80.52 | Endometriosis of the sigmoid colon | NON-BILLABLE CODE |
| N80.521 | Superficial endometriosis of the sigmoid colon | BILLABLE CODE |
| N80.522 | Deep endometriosis of the sigmoid colon | BILLABLE CODE |
| N80.529 | Endometriosis of the sigmoid colon, unspecified depth | BILLABLE CODE |
| N80.53 | Endometriosis of the cecum | NON-BILLABLE CODE |
| N80.531 | Superficial endometriosis of the cecum | BILLABLE CODE |
| N80.532 | Deep endometriosis of the cecum | BILLABLE CODE |
| N80.539 | Endometriosis of the cecum, unspecified depth | BILLABLE CODE |
| N80.54 | Endometriosis of the appendix | NON-BILLABLE CODE |
| N80.541 | Superficial endometriosis of the appendix | BILLABLE CODE |
| N80.542 | Deep endometriosis of the appendix | BILLABLE CODE |
| N80.549 | Endometriosis of the appendix, unspecified depth | BILLABLE CODE |
| N80.55 | Endometriosis of other parts of the colon | NON-BILLABLE CODE |
| N80.551 | Superficial endometriosis of other parts of the colon | BILLABLE CODE |
| N80.552 | Deep endometriosis of other parts of the colon | BILLABLE CODE |
| N80.559 | Endometriosis of other parts of the colon, unspecified depth | BILLABLE CODE |
| N80.56 | Endometriosis of the small intestine | NON-BILLABLE CODE |
| N80.561 | Superficial endometriosis of the small intestine | BILLABLE CODE |
| N80.562 | Deep endometriosis of the small intestine | BILLABLE CODE |
| N80.569 | Endometriosis of the small intestine, unspecified depth | BILLABLE CODE |
