ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.3 > N80.34 N80.34 Deep endometriosis of the pelvic sidewall Non-Billable/Non-Specific Codes N80.341Deep endometriosis of the right pelvic sidewallN80.342Deep endometriosis of the left pelvic sidewallN80.343Deep endometriosis of the bilateral pelvic sidewallN80.349Deep endometriosis of the pelvic sidewall, unspecified side