ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.5 > N80.56 N80.56 Endometriosis of the small intestine Non-Billable/Non-Specific Codes N80.561Superficial endometriosis of the small intestineN80.562Deep endometriosis of the small intestineN80.569Endometriosis of the small intestine, unspecified depth