2027 ICD-10-CM Diagnosis Code N83.209Unspecified ovarian cyst, unspecified side

ICD-10-CM Codes›N00–N99›N80-N98›N83

ICD-10-CM N83.209
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N83.209 is a billable ICD-10-CM diagnosis code for unspecified ovarian cyst, unspecified side. 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. Coders also document this condition as cyst of ovary. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign ovarian cyst.

Code Identity

ICD-10-CM Code
N83.209
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified ovarian cyst, unspecified side
Short Description
Unspecified ovarian cyst, unspecified side
Same as the full description in the CMS dataset.
Parent Code
N83.20
Unspecified ovarian cysts

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN83Noninflammatory disorders of ovary, fallopian tube and broad ligament
This CodeN83.209Unspecified ovarian cyst, unspecified side

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cyst of ovary
  • Cyst of ovary in pregnancy
  • Hemorrhagic cyst of ovary
  • Rupture of ovary
  • Ruptured cyst of ovary

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N83.209: its own notes plus those printed at N83.2, N83, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Ovarian cyst, NOS

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From N83.2 Other and unspecified ovarian cysts applies to 6 codes
  • developmental ovarian cyst (Q50.1)
  • neoplastic ovarian cyst (D27.-)
  • polycystic ovarian syndrome (E28.2)
  • Stein-Leventhal syndrome (E28.2)

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 N83 Noninflammatory disorders of ovary, fallopian tube and broad ligament applies to 35 codes
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N83.209, its category, or a range that includes it.

Excludes2 3

These codes carry an Excludes2 note naming N83.209: its condition is not part of those codes, and both may be reported when the patient has both.

  • D27 Benign neoplasm of ovary
    corpus albicans cyst (N83.2-) names N83.2-, which includes this code
  • D27 Benign neoplasm of ovary
    ovarian cyst NEC (N83.2-) names N83.2-, which includes this code
  • D27 Benign neoplasm of ovary
    ovarian retention cyst (N83.2-) names N83.2-, which includes this code

Clinical ClassificationClinical

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

CCSR GEN022
Benign ovarian cyst
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 N83.209 to ICD-9-CMHistory

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

ICD-9-CM
620.2 Ovarian cyst NEC/NOS
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement N83.209 replaces the following previously assigned code(s):

  • N83.20 - Unspecified ovarian cysts
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N83.209Overview

What is the ICD-10 code for unspecified ovarian cyst, unspecified side?

The ICD-10-CM code for unspecified ovarian cyst, unspecified side is N83.209 (sometimes written as N83209). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N83.209 (Unspecified ovarian cysts) a billable code?

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

What MS-DRG does N83.209 group to?

When unspecified ovarian cyst, unspecified side 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.

Can N83.209 be reported with Q50.1?

Not as a rule. The Excludes1 note at N83.2, which applies to N83.209, lists "developmental ovarian cyst (Q50.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of N83.209?

Under the General Equivalence Mappings, unspecified ovarian cyst, unspecified side converts to ICD-9-CM 620.2 (ovarian cyst NEC/NOS). The mapping is approximate, so confirm the match fits the documentation.