ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.3 > N80.32 N80.32 Endometriosis of the posterior cul-de-sac Non-Billable/Non-Specific Codes N80.321Superficial endometriosis of the posterior cul-de-sacN80.322Deep endometriosis of the posterior cul-de-sacN80.329Endometriosis of the posterior cul-de-sac, unspecified depth