2027 ICD-10-CM Diagnosis Code D27.1Benign neoplasm of left ovary
ICD-10-CM Codes›C00–D49›D10-D36›D27
- Billable — Valid for Submission
- Not Chronic
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 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Benign germ cell neoplasm 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D27.1: 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.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any functional activity.
Notes
General instructions on how these codes are used.
- 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 D27.1, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming D27.1: they are not reported together with it, unless the two conditions are unrelated.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 D27.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D27.1Overview
What is the ICD-10 code for benign neoplasm of left ovary?
The ICD-10-CM code for benign neoplasm of left ovary is D27.1 (sometimes written as D271). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 0.7039 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.
Does D27.1 need an additional code?
When the condition applies, yes. The Use Additional Code note at D27, which applies to D27.1, reads: code to identify any functional activity.. The additional code is reported after D27.1.
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.
