N80.109
Endometriosis of ovary, unspecified side, unspecified depth
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 3 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 1
N80.109code
Inclusion terms
- Endometriosis of ovary NOS
Index entries leading here 7
- Cyst (colloid) (mucous) (simple) (retention)
- Chocolate cyst (ovary) N80.10
- Cystoma — see also Neoplasm, benign, by site
- endometrial, ovary N80.10
- Endometriosis N80.9
- ovary (unspecified depth) N80.10
- Tumor — see also Neoplasm, unspecified behavior, by site
- Sampson's N80.10
- Sampson's cyst or tumor N80.10
- Transplants, ovarian, endometrial N80.10
Alongside this code 3 same parent — N80.10
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.