E31: Polyglandular dysfunction
Codes under E31 (Polyglandular dysfunction). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| E31.0 | Autoimmune polyglandular failure | ✓ |
| E31.0 | Autoimmune polyglandular failure | ✓ |
| E31.1 | Polyglandular hyperfunction | ✓ |
| E31.1 | Polyglandular hyperfunction | ✓ |
| E31.2 | Multiple endocrine neoplasia [MEN] syndromes | — |
| E31.2 | Multiple endocrine neoplasia [MEN] syndromes | — |
| E31.8 | Other polyglandular dysfunction | ✓ |
| E31.8 | Other polyglandular dysfunction | ✓ |
| E31.9 | Polyglandular dysfunction, unspecified | ✓ |
| E31.9 | Polyglandular dysfunction, unspecified | ✓ |
| E31.20 | Multiple endocrine neoplasia [MEN] syndrome, unspecified | ✓ |
| E31.20 | Multiple endocrine neoplasia [MEN] syndrome, unspecified | ✓ |
| E31.21 | Multiple endocrine neoplasia [MEN] type I | ✓ |
| E31.21 | Multiple endocrine neoplasia [MEN] type I | ✓ |
| E31.22 | Multiple endocrine neoplasia [MEN] type IIA | ✓ |
| E31.22 | Multiple endocrine neoplasia [MEN] type IIA | ✓ |
| E31.23 | Multiple endocrine neoplasia [MEN] type IIB | ✓ |
| E31.23 | Multiple endocrine neoplasia [MEN] type IIB | ✓ |
Frequently asked questions
What is ICD-10-CM code E31?
E31 is an ICD-10-CM category covering Polyglandular dysfunction. It contains 18 more specific diagnosis codes, 16 of which are billable.
Is E31 a billable code?
No — E31 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example E31.0 — Autoimmune polyglandular failure). 16 of the 18 codes under E31 are billable.
What codes fall under E31?
E31 includes E31.0, E31.0, E31.1, E31.1, E31.2, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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