D27.9
Benign neoplasm of unspecified ovary
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 2 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 7 never code together
D27code
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 9
D27code
Use additional code
- code to identify any functional activity.
C00-D49chapter
Notes
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).C25.9
Index entries leading here 15
- Adenofibroma
- Sertoli cell
- Adenoma — see also Neoplasm, benign, by site
- Androblastoma
- Arrhenoblastoma
- benign
- unspecified site
- female D27.9
- unspecified site
- benign
- Tumor — see also Neoplasm, unspecified behavior, by site
- Leydig cell — see Neoplasm, uncertain behavior, by site
- benign — see Neoplasm, benign, by site
- unspecified site
- female D27.9
- unspecified site
- benign — see Neoplasm, benign, by site
- Brenner D27.9
- Sertoli cell — see Neoplasm, benign, by site
- Sertoli-Leydig cell — see Neoplasm, benign, by site
- unspecified site
- female D27.9
- unspecified site
- hilar cell D27
- hilus cell D27
- lipid cell, ovary D27
- lipoid cell, ovary D27
- sclerosing stromal D27
- Leydig cell — see Neoplasm, uncertain behavior, by site
- Brenner
- tumor (benign) D27.9
- Cystadenofibroma
- Cystadenoma — see also Neoplasm, benign, by site
- papillary
- mucinous
- pseudomucinous
- serous
- Cyst (colloid) (mucous) (simple) (retention)
- Cystoma — see also Neoplasm, benign, by site
- Sertoli-Leydig cell tumor — see Neoplasm, benign, by site
- unspecified site
- female D27.9
- unspecified site
- Folliculome lipidique
- unspecified site
- female D27.9
- unspecified site
- Thecoma D27
- luteinized D27
- Papilloma — see also Neoplasm, benign, by site
- serous surface
- unspecified site D27.9
- serous surface
Alongside this code 2 same parent — D27
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.