ICD-10 Code for Endometriosis

The default ICD-10-CM 2027 code for endometriosis is N80.9 – Endometriosis, unspecified. More specific codes depend on the details documented, as listed in the official index (89 codes, 69 billable).

Main code: N80.9 – Endometriosis, unspecified
Billable: Yes

Index entries for Endometriosis

abdomen, abdominal – N80.C0
- specified site, NEC – N80.C9
- wall – N80.C19
  - fascia and muscular layers – N80.C11
  - subcutaneous tissue – N80.C10
  - unspecified depth – N80.C19
appendix – N80.549
- deep – N80.542
- superficial – N80.541
bladder (unspecified depth) – N80.A0
- deep – N80.A2
- superficial – N80.A1
bowel – N80.50
broad ligament – N80.3C (header)
cardiothoracic space – N80.B6
cecum – N80.539
- deep – N80.532
- superficial – N80.531
cervix – N80.0- (header)
colon – N80.559
- descending – N80.559
  - deep – N80.552
  - superficial – N80.551
- sigmoid – N80.529
  - deep – N80.522
  - superficial – N80.521
- transverse – N80.559
  - deep – N80.552
  - superficial – N80.551
cul-de-sac (Douglas')
- anterior (unspecified depth) – N80.319
  - deep – N80.312
  - superficial – N80.311
- posterior (unspecified depth) – N80.329
  - deep – N80.322
  - superficial – N80.321
deep
- involving muscular wall of fallopian tube – N80.22 (header)
- retrocervical – N80.02
diaphragm – N80.B39
- deep – N80.B32
- superficial – N80.B31
- unspecified depth – N80.B39
exocervix – N80.01
extra-pelvic abdominal peritoneum – N80.C4
fallopian tube (unspecified depth) – N80.20- (header)
- deep – N80.22- (header)
- superficial – N80.21- (header)
female genital organ NEC – N80.8
gallbladder – N80.8
inguinal canal – N80.C3
in scar of skin – N80.6
internal – N80.02
intestine – N80.50
- small – N80.569
  - deep (multifocal) – N80.562
  - superficial – N80.561
lung – N80.B2
mediastinal space – N80.B5
myometrium – N80.03
nerve
- femoral – N80.D6
- obturator – N80.D3
- pelvic – N80.D0
  - splanchnic – N80.D1
- pudendal – N80.D5
- retroperitoneum, NEC – N80.D9
- sacral splanchnic – N80.D1
- sciatic – N80.D4
- specified, NEC – N80.D9
ovary (unspecified depth) – N80.10- (header)
- deep – N80.12- (header)
- superficial – N80.11- (header)
parametrium – N80.399
pelvic
- brim – N80.38- (header)
  - deep – N80.37- (header)
  - superficial – N80.36- (header)
- peritoneum – N80.30
  - specified sites, NEC – N80.399
    - deep – N80.392
    - superficial – N80.391
- sidewall – N80.35- (header)
  - deep – N80.34- (header)
  - superficial – N80.33- (header)
pericardial space – N80.B4
peritoneal (pelvic) – N80.30
pleura – N80.B1
rectovaginal septum – N80.40
- with involvement of vagina – N80.42
- without involvement of vagina – N80.41
rectum – N80.519
- deep (multifocal) – N80.512
- superficial – N80.511
retroperitoneum – N80.30
round ligament – N80.3C9
sacral nerve roots – N80.D2
skin (scar) – N80.6
specified site NEC – N80.8
stromal – D39.0
thorax – N80.B- (header)
umbilicus – N80.C2
ureter – N80.A69
- deep – N80.A5- (header)
- extrinsic – N80.A4- (header)
- intrinsic – N80.A5- (header)
- superficial – N80.A4- (header)
- unspecified depth – N80.A6- (header)
uterosacral ligament (s) – N80.3C- (header)
- deep – N80.3B- (header)
- superficial – N80.3A- (header)
uterus – N80.00
- deep – N80.02
- internal – N80.02
- superficial – N80.01
vagina – N80.42
vulva – N80.8

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.