ICD-10-CM > N00-N99 > N80-N98 > N80 > N80.B > N80.B3 N80.B3 Endometriosis of diaphragm Non-Billable/Non-Specific Codes N80.B31Superficial endometriosis of diaphragmN80.B32Deep endometriosis of diaphragmN80.B39Endometriosis of diaphragm, unspecified depth