2027 ICD-10-CM Diagnosis Code D27.9Benign neoplasm of unspecified ovary

ICD-10-CM Codes›C00–D49›D10-D36›D27

ICD-10-CM D27.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D27.9 is a billable ICD-10-CM diagnosis code for benign neoplasm of unspecified ovary. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 742 through 743, 760 through 761. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D27.9
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of unspecified ovary
Short Description
Benign neoplasm of unspecified ovary
Same as the full description in the CMS dataset.
Parent Code
D27
Benign neoplasm of ovary

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD27Benign neoplasm of ovary
This CodeD27.9Benign neoplasm of unspecified ovary

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adenoma of ovary
  • Atypical Meigs syndrome
  • Benign Brenner tumor of ovary
  • Benign epithelial neoplasm of ovary
  • Benign germ cell neoplasm of ovary
  • Benign neoplasm of ovary
  • Benign Sertoli-Leydig cell tumor of ovary
  • Benign sex cord tumor of ovary
  • Benign teratoma of ovary
  • Benign thecoma of ovary
  • Cystadenoma of ovary in childhood
  • Fibroma of ovary
  • Fibrothecoma of ovary
  • Germinal inclusion cyst of ovary
  • Hilus cell tumor of ovary
  • Hyperthyroidism due to struma ovarii
  • Mature solid teratoma of ovary
  • Meigs' syndrome
  • Microcystic stromal tumor of ovary
  • Mucinous cystadenoma of ovary
  • Mucinous cystadenoma of ovary in childhood
  • Noninflammatory disorder of ovary
  • Ovarian hilar cell hyperplasia
  • Right pleural effusion
  • Seromucinous cystadenoma of ovary in childhood
  • Serous cystadenoma of ovary
  • Serous cystadenoma of ovary in childhood
  • Serous papillary cystadenoma of ovary
  • Struma ovarii
  • Teratoma of ovary

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D27.9: its own notes plus those printed at D27 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From D27 Benign neoplasm of ovary applies to 3 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From D27 Benign neoplasm of ovary applies to 3 codes
  • code to identify any functional activity.

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • 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).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name D27.9, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming D27.9: they are not reported together with it, unless the two conditions are unrelated.

  • D35 Benign neoplasm of other and unspecified endocrine glands
    benign neoplasm of ovary (D27.-) names D27.-, which includes this code
  • N83.2 Other and unspecified ovarian cysts
    neoplastic ovarian cyst (D27.-) names D27.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO073
Benign neoplasms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Luteoma

    an ovarian neoplasm composed of luteal cells derived from luteinized granulosa cells and theca cells. luteomas respond to gonadotropins, and vary in their hormone production (progesterone; estrogens; or androgens). during pregnancy, a transient type of luteoma may develop due to an exaggerated luteinization of the ovary.

  • Thecoma

    a gonadal stromal neoplasm composed only of theca cells, occurring mostly in the postmenopausal ovary. it is filled with lipid-containing spindle cells and produces estrogens that can lead to endometrial hyperplasia; uterine hemorrhage; or other malignancies in postmenopausal women and sexual precocity in girls. when tumors containing theca cells also contain fibroblasts, they are identified as thecoma-fibroma tumors with less active hormone production.

Patient EducationClinical

Ovarian Cysts

The ovaries are part of the female reproductive system. They produce a woman's eggs and make female hormones. Ovarian cysts are fluid-filled sacs in or on an ovary. They usually form during ovulation, when the ovary releases an egg. They are usually harmless and go away by themselves. Most women have them sometime during their lives.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D27.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
220 Benign neoplasm ovary
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D27.9Overview

What is the ICD-10 code for benign neoplasm of unspecified ovary?

The ICD-10-CM code for benign neoplasm of unspecified ovary is D27.9 (sometimes written as D279). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D27.9 (Benign neoplasm of ovary) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of unspecified ovary on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D27.9 group to?

When benign neoplasm of unspecified ovary is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.7039 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.

Does D27.9 need an additional code?

When the condition applies, yes. The Use Additional Code note at D27, which applies to D27.9, reads: code to identify any functional activity.. The additional code is reported after D27.9.

What is the ICD-9 equivalent of D27.9?

Under the General Equivalence Mappings, benign neoplasm of unspecified ovary converts to ICD-9-CM 220 (benign neoplasm ovary). The mapping is approximate, so confirm the match fits the documentation.