ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.3 > N80.35 N80.35 Endometriosis of the pelvic sidewall, unspecified depth Non-Billable/Non-Specific Codes N80.351Endometriosis of the right pelvic sidewall, unspecified depthN80.352Endometriosis of the left pelvic sidewall, unspecified depthN80.353Endometriosis of bilateral pelvic sidewall, unspecified depthN80.359Endometriosis of pelvic sidewall, unspecified side, unspecified depth