ICD-10 Code E31.9 – Polyglandular dysfunction, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E31.9 – Polyglandular dysfunction, unspecified
What it is
E31.9 identifies a polyglandular dysfunction when the record does not specify the endocrine glands involved or the exact syndrome type. Use it for an unspecified disorder affecting more than one endocrine gland.
Clinical signs
Clinical features vary; refer to documentation. Patients may show signs of multiple endocrine gland dysfunction, but the record should not name a specific polyglandular syndrome or a more detailed endocrine diagnosis.
When to use this code
Use E31.9 when the provider documents polyglandular dysfunction without further detail. It also fits when the chart confirms involvement of multiple endocrine glands but does not identify the exact glands or syndrome. Check documentation if another endocrine disorder is named.
Do not use for
Do not use this code if the record identifies a specific polyglandular syndrome or a separate, more specific endocrine disorder. Do not assign it when documentation is unclear and you need confirmation.
Coding tip
Choose the most specific endocrine code available first; use E31.9 only when the documentation truly remains unspecified.