2026 ICD-10-CM Diagnosis Code D27.1Benign neoplasm of left ovary

ICD-10-CM Codes›C00–D49›D10-D36›D27

ICD-10-CM D27.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D27.1 is a billable ICD-10-CM diagnosis code for benign neoplasm of left 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
D27.1
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of left ovary
Short Description
Benign neoplasm of left 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 CodeD27.1Benign neoplasm of left ovary

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign germ cell tumor of ovary
  • Benign neoplasm of left ovary
  • Benign neoplasm of right ovary
  • Benign sex cord tumor of ovary
  • Benign teratoma of ovary
  • Bilateral benign neoplasm of ovaries
  • Bilateral mature cystic teratoma of ovaries
  • Brenner tumor of left ovary
  • Fibroma of left ovary
  • Fibroma of ovary
  • Mature cystic teratoma of left ovary
  • Mature cystic teratoma of right ovary
  • Mucinous cystadenoma of left ovary
  • Mucinous cystadenoma of ovary
  • Serous cystadenoma of left ovary
  • Serous cystadenoma of ovary
  • Teratoma of ovary

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 D27.1 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 D27.1Overview

Is D27.1 (Benign neoplasm of ovary) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of left ovary on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D27.1 group to?

When benign neoplasm of left 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 D27.1?

Under the General Equivalence Mappings, benign neoplasm of left 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.