2027 ICD-10-CM Diagnosis Code N99.83Residual ovary syndrome
ICD-10-CM Codes›N00–N99›N99›N99
- Billable — Valid for Submission
- Not Chronic
N99.83 is a billable ICD-10-CM diagnosis code for residual ovary syndrome. 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 ovarian remnant syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative genitourinary system complication.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Ovarian remnant syndrome
- Residual ovary syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N99.83: its own notes plus those printed at N99 and Chapter 14. 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.
- 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 N99.83, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming N99.83: its condition is not part of those codes, and both may be reported when the patient has both.
- Block T80-T88 Complications of surgical and medical care, not elsewhere classifiedintraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names N99.-, which includes this code
- T81 Complications of procedures, not elsewhere classifiedintraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names N99.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Residual See Also: condition;
ovary syndrome N99.83
Retention See Also: Retained;
ovary syndrome N99.83
Syndrome See Also: Disease;
residual ovary N99.83
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Ovarian Disorders
The ovaries are a pair of female reproductive glands that make eggs and female hormones. Women have one ovary on each side of the uterus (where a fetus grows during pregnancy). Each ovary is about the size and shape of an almond.
The full article covers:
- What are ovaries?
- What are the types of ovarian disorders?
- What causes ovarian disorders?
- What are the symptoms of ovarian disorders?
- How are ovarian disorders diagnosed?
- What are the treatments for ovarian disorders?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N99.83 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N99.83Overview
What is the ICD-10 code for residual ovary syndrome?
The ICD-10-CM code for residual ovary syndrome is N99.83 (sometimes written as N9983). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N99.83 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report residual ovary syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N99.83 group to?
When residual ovary syndrome 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.
What is the ICD-9 equivalent of N99.83?
Under the General Equivalence Mappings, residual ovary syndrome converts to ICD-9-CM 620.8 (noninfl dis ova/adnx NEC). The mapping is approximate, so confirm the match fits the documentation.
