N80.9
Endometriosis, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 12 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 8 never code together
N00-N99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes
No further instructional notes apply.
Alongside this code 12 same parent — N80
N80.0 Endometriosis of uterus category N80.1 Endometriosis of ovary category N80.2 Endometriosis of fallopian tube category N80.3 Endometriosis of pelvic peritoneum category N80.4 Endometriosis of rectovaginal septum and vagina category N80.5 Endometriosis of intestine category N80.6 Endometriosis in cutaneous scar N80.A Endometriosis of bladder and ureters category N80.B Endometriosis of cardiothoracic space category N80.C Endometriosis of the abdomen category N80.D Endometriosis of the pelvic nerves category N80.8 Other endometriosis
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.