ICD-10 Code E28.9 – Ovarian dysfunction, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E28.9 – Ovarian dysfunction, unspecified
What it is
E28.9 identifies ovarian dysfunction when the specific disorder is not documented. Use it for a general diagnosis of impaired ovarian function without a more precise subtype.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records may note menstrual irregularity, anovulation, infertility, or other signs of reduced ovarian function, but the exact pattern should be stated by the clinician.
When to use this code
Use E28.9 when the provider documents ovarian dysfunction but does not specify a more exact condition. It is appropriate when the chart lacks detail needed for a specific ovarian disorder code. You should code the documented diagnosis, not assumptions.
Do not use for
Do not use this code when a more specific ovarian disorder is documented, such as a clearly identified endocrine or structural condition. Check documentation if the record instead describes infertility or menstrual problems without ovarian dysfunction.
Coding tip
Query for specificity when the note says only “ovarian dysfunction” or gives unclear reproductive findings.