2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

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 2026 (October 1, 2025 through September 30, 2026) 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.

  • Atypical Meigs syndrome
  • Benign Brenner tumor of ovary
  • Benign epithelial tumor of ovary
  • Benign germ cell tumor of ovary
  • Benign neoplasm of ovary
  • Benign Sertoli-Leydig cell tumor of ovary
  • Benign sex cord tumor of ovary
  • Benign teratoma 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
  • Teratoma of ovary
  • Theca cell tumor of ovary

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Adenofibroma
      • endometrioid
    • Adenofibroma
      • mucinous
        • unspecified site
    • Adenofibroma
      • papillary
        • unspecified site
    • Adenofibroma
      • serous
        • unspecified site
    • Adenofibroma
      • unspecified site
    • Adenoma
      • Pick's tubular
        • unspecified site
          • female
    • Adenoma
      • Sertoli cell
        • unspecified site
          • female
    • Adenoma
      • testicular
        • unspecified site
          • female
    • Adenoma
      • tubular
        • Pick's
          • unspecified site
            • female
    • Androblastoma
      • benign
        • unspecified site
          • female
    • Androblastoma
      • tubular
        • with lipid storage
          • unspecified site
            • female
    • Androblastoma
      • tubular
        • unspecified site
          • female
    • Arrhenoblastoma
      • benign
        • unspecified site
          • female
    • Brenner
      • tumor (benign)
    • Cyst(colloid) (mucous) (simple) (retention)
      • ovary, ovarian (twisted)
        • dermoid
    • Cyst(colloid) (mucous) (simple) (retention)
      • ovary, ovarian (twisted)
        • pseudomucinous
    • Cyst(colloid) (mucous) (simple) (retention)
      • pseudomucinous (ovary)
    • Cystadenofibroma
      • endometrioid
    • Cystadenofibroma
      • mucinous
        • unspecified site
    • Cystadenofibroma
      • serous
        • unspecified site
    • Cystadenofibroma
      • unspecified site
    • Cystadenoma
      • mucinous
        • papillary
          • unspecified site
    • Cystadenoma
      • mucinous
        • unspecified site
    • Cystadenoma
      • papillary
        • mucinous
          • unspecified site
    • Cystadenoma
      • papillary
        • pseudomucinous
          • unspecified site
    • Cystadenoma
      • papillary
        • serous
          • unspecified site
    • Cystadenoma
      • papillary
        • unspecified site
    • Cystadenoma
      • pseudomucinous
        • papillary
          • unspecified site
    • Cystadenoma
      • pseudomucinous
        • unspecified site
    • Cystadenoma
      • serous
        • papillary
          • unspecified site
    • Cystadenoma
      • serous
        • unspecified site
    • Cystoma
      • mucinous
        • unspecified site
    • Cystoma
      • serous
        • unspecified site
    • Folliculome lipidique
      • unspecified site
        • female
    • Papilloma
      • serous surface
        • unspecified site
    • Sertoli cell
      • adenoma
        • unspecified site
          • female
    • Sertoli cell
      • tumor
        • with lipid storage
          • unspecified site
            • female
    • Sertoli cell
      • tumor
        • unspecified site
          • female
    • Sertoli-Leydig cell tumor
      • unspecified site
        • female
    • Tumor
      • Brenner
    • Tumor
      • Leydig cell
        • benign
          • unspecified site
            • female
    • Tumor
      • Sertoli cell
        • with lipid storage
          • unspecified site
            • female
    • Tumor
      • Sertoli cell
        • unspecified site
          • female
    • Tumor
      • Sertoli-Leydig cell
        • unspecified site
          • female

Clinical ClassificationClinical

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

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

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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D27.9Overview

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, 2025 through September 30, 2026.

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 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.