ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.1 > N80.12 N80.12 Deep endometriosis of ovary Non-Billable/Non-Specific Applicable To Deep ovarian endometriosisEndometrioma Codes N80.121Deep endometriosis of right ovaryN80.122Deep endometriosis of left ovaryN80.123Deep endometriosis of bilateral ovariesN80.129Deep endometriosis of ovary, unspecified ovary