ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.3 > N80.31 N80.31 Endometriosis of the anterior cul-de-sac Non-Billable/Non-Specific Codes N80.311Superficial endometriosis of the anterior cul-de-sacN80.312Deep endometriosis of the anterior cul-de-sacN80.319Endometriosis of the anterior cul-de-sac, unspecified depth