ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.5 > N80.55 N80.55 Endometriosis of other parts of the colon Non-Billable/Non-Specific Applicable To Endometriosis of descending colonEndometriosis of transverse colon Codes N80.551Superficial endometriosis of other parts of the colonN80.552Deep endometriosis of other parts of the colonN80.559Endometriosis of other parts of the colon, unspecified depth