ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.3 > N80.39 N80.39 Endometriosis of other pelvic peritoneum Non-Billable/Non-Specific Codes N80.391Superficial endometriosis of the pelvic peritoneum, other specified sitesN80.392Deep endometriosis of the pelvic peritoneum, other specified sitesN80.399Endometriosis of the pelvic peritoneum, other specified sites, unspecified depth