ICD-10 Code E31.2 – Multiple endocrine neoplasia [MEN] syndromes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E31.2 – Multiple endocrine neoplasia [MEN] syndromes
What it is
E31.2 identifies multiple endocrine neoplasia syndromes, a group of inherited disorders that cause tumors or overactivity in more than one endocrine gland. Use it when the record documents MEN syndrome rather than a single isolated endocrine tumor.
Clinical signs
Clinical features vary by MEN subtype, but may include endocrine tumors, gland enlargement, or hormone-related symptoms. If the subtype is not specified, check documentation for the exact syndrome and associated manifestations.
When to use this code
Use this code when the provider documents MEN syndrome, MEN type 1, MEN type 2, or a similar hereditary endocrine neoplasia disorder. Apply it for confirmed diagnoses in the problem list, assessment, or discharge summary. If the note only mentions a family history or suspected MEN, do not code it as confirmed.
Do not use for
Do not use E31.2 for a single endocrine tumor without documentation of MEN syndrome. Also avoid it when the chart only states screening, risk, or family history; check documentation.
Coding tip
Capture the specific MEN subtype and any documented endocrine manifestations, because additional codes may be needed for the associated tumors or complications.