ICD-10 Code for Endometriosis
The ICD-10-CM code for endometriosis is N80.9 — Endometriosis, unspecified. This is the code the Alphabetic Index gives for endometriosis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
BillableUnspecified
N80.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which endometriosis code should you use?
The Alphabetic Index lists 89 codes under Endometriosis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| abdomen, abdominal | N80.C0 | Endometriosis of the abdomen, unspecified | |
| appendix | N80.549 | Endometriosis of the appendix, unspecified depth | |
| bladder | N80.A0 | Endometriosis of bladder, unspecified depth | |
| bowel | N80.50 | Endometriosis of intestine, unspecified | |
| broad ligament | N80.3C | Endometriosis of the uterosacral ligament(s), unspecified depth | not billable |
| cardiothoracic space | N80.B6 | Endometriosis of cardiothoracic space | |
| cecum | N80.539 | Endometriosis of the cecum, unspecified depth | |
| cervix | N80.0 | Endometriosis of uterus | not billable |
| colon | N80.559 | Endometriosis of other parts of the colon, unspecified depth | |
| diaphragm | N80.B39 | Endometriosis of diaphragm, unspecified depth | |
| exocervix | N80.01 | Superficial endometriosis of the uterus | |
| extra-pelvic abdominal peritoneum | N80.C4 | Endometriosis of extra-pelvic abdominal peritoneum | |
| fallopian tube | N80.20 | Endometriosis of fallopian tube, unspecified depth | not billable |
| female genital organ NEC | N80.8 | Other endometriosis | |
| gallbladder | N80.8 | Other endometriosis | |
| inguinal canal | N80.C3 | Endometriosis of the inguinal canal | |
| in scar of skin | N80.6 | Endometriosis in cutaneous scar | |
| internal | N80.02 | Deep endometriosis of the uterus | |
| intestine | N80.50 | Endometriosis of intestine, unspecified | |
| lung | N80.B2 | Endometriosis of lung | |
| mediastinal space | N80.B5 | Endometriosis of the mediastinal space | |
| myometrium | N80.03 | Adenomyosis of the uterus | |
| ovary | N80.10 | Endometriosis of ovary, unspecified depth | not billable |
| parametrium | N80.399 | Endometriosis of the pelvic peritoneum, other specified sites, unspecified depth | |
| pericardial space | N80.B4 | Endometriosis of the pericardial space | |
| peritoneal | N80.30 | Endometriosis of pelvic peritoneum, unspecified | |
| pleura | N80.B1 | Endometriosis of pleura | |
| rectovaginal septum | N80.40 | Endometriosis of rectovaginal septum, unspecified involvement of vagina | |
| rectum | N80.519 | Endometriosis of the rectum, unspecified depth | |
| retroperitoneum | N80.30 | Endometriosis of pelvic peritoneum, unspecified | |
| round ligament | N80.3C9 | Endometriosis of the uterosacral ligament(s), unspecified side, unspecified depth | |
| sacral nerve roots | N80.D2 | Endometriosis of the sacral nerve roots | |
| skin | N80.6 | Endometriosis in cutaneous scar | |
| specified site NEC | N80.8 | Other endometriosis | |
| stromal | D39.0 | Neoplasm of uncertain behavior of uterus | |
| thorax | N80.B | Endometriosis of cardiothoracic space | not billable |
| umbilicus | N80.C2 | Endometriosis of the umbilicus | |
| ureter | N80.A69 | Endometriosis of unspecified ureter, unspecified depth | |
| uterosacral ligament | N80.3C | Endometriosis of the uterosacral ligament(s), unspecified depth | not billable |
| uterus | N80.00 | Endometriosis of the uterus, unspecified | |
| vagina | N80.42 | Endometriosis of rectovaginal septum with involvement of vagina | |
| vulva | N80.8 | Other endometriosis |
Endometriosis abdomen, abdominal
| specified site, NEC | N80.C9 | Endometriosis of other site of abdomen | |
| wall | N80.C19 | Endometriosis of the anterior abdominal wall, unspecified depth | |
| wall › fascia and muscular layers | N80.C11 | Endometriosis of the anterior abdominal wall, fascia and muscular layers | |
| wall › subcutaneous tissue | N80.C10 | Endometriosis of the anterior abdominal wall, subcutaneous tissue | |
| wall › unspecified depth | N80.C19 | Endometriosis of the anterior abdominal wall, unspecified depth |
Endometriosis appendix
Endometriosis bladder
Endometriosis cecum
Endometriosis colon
| descending | N80.559 | Endometriosis of other parts of the colon, unspecified depth | |
| sigmoid | N80.529 | Endometriosis of the sigmoid colon, unspecified depth | |
| transverse | N80.559 | Endometriosis of other parts of the colon, unspecified depth | |
| descending › deep | N80.552 | Deep endometriosis of other parts of the colon | |
| descending › superficial | N80.551 | Superficial endometriosis of other parts of the colon | |
| sigmoid › deep | N80.522 | Deep endometriosis of the sigmoid colon | |
| sigmoid › superficial | N80.521 | Superficial endometriosis of the sigmoid colon | |
| transverse › deep | N80.552 | Deep endometriosis of other parts of the colon | |
| transverse › superficial | N80.551 | Superficial endometriosis of other parts of the colon |
Endometriosis cul-de-sac
| anterior | N80.319 | Endometriosis of the anterior cul-de-sac, unspecified depth | |
| posterior | N80.329 | Endometriosis of the posterior cul-de-sac, unspecified depth | |
| anterior › deep | N80.312 | Deep endometriosis of the anterior cul-de-sac | |
| anterior › superficial | N80.311 | Superficial endometriosis of the anterior cul-de-sac | |
| posterior › deep | N80.322 | Deep endometriosis of the posterior cul-de-sac | |
| posterior › superficial | N80.321 | Superficial endometriosis of the posterior cul-de-sac |
Endometriosis deep
Endometriosis diaphragm
Endometriosis fallopian tube
Endometriosis intestine
Endometriosis nerve
| femoral | N80.D6 | Endometriosis of the femoral nerve | |
| obturator | N80.D3 | Endometriosis of the obturator nerve | |
| pelvic | N80.D0 | Endometriosis of the pelvic nerves, unspecified | |
| pudendal | N80.D5 | Endometriosis of the pudendal nerve | |
| retroperitoneum, NEC | N80.D9 | Endometriosis of other pelvic nerve | |
| sacral splanchnic | N80.D1 | Endometriosis of the sacral splanchnic nerves | |
| sciatic | N80.D4 | Endometriosis of the sciatic nerve | |
| specified, NEC | N80.D9 | Endometriosis of other pelvic nerve | |
| pelvic › splanchnic | N80.D1 | Endometriosis of the sacral splanchnic nerves |
Endometriosis ovary
Endometriosis pelvic
| brim | N80.38 | Endometriosis of the pelvic brim, unspecified depth | not billable |
| peritoneum | N80.30 | Endometriosis of pelvic peritoneum, unspecified | |
| sidewall | N80.35 | Endometriosis of the pelvic sidewall, unspecified depth | not billable |
| brim › deep | N80.37 | Deep endometriosis of the pelvic brim | not billable |
| brim › superficial | N80.36 | Superficial endometriosis of the pelvic brim | not billable |
| peritoneum › specified sites, NEC | N80.399 | Endometriosis of the pelvic peritoneum, other specified sites, unspecified depth | |
| sidewall › deep | N80.34 | Deep endometriosis of the pelvic sidewall | not billable |
| sidewall › superficial | N80.33 | Superficial endometriosis of the pelvic sidewall | not billable |
| peritoneum › specified sites, NEC › deep | N80.392 | Deep endometriosis of the pelvic peritoneum, other specified sites | |
| peritoneum › specified sites, NEC › superficial | N80.391 | Superficial endometriosis of the pelvic peritoneum, other specified sites |
Endometriosis rectovaginal septum
Endometriosis rectum
Endometriosis ureter
| deep | N80.A5 | Deep endometriosis of ureter | not billable |
| extrinsic | N80.A4 | Superficial endometriosis of ureter | not billable |
| intrinsic | N80.A5 | Deep endometriosis of ureter | not billable |
| superficial | N80.A4 | Superficial endometriosis of ureter | not billable |
| unspecified depth | N80.A6 | Endometriosis of ureter, unspecified depth | not billable |
Endometriosis uterosacral ligament
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources