ICD-10 Code E51.1 – Beriberi (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E51.1 – Beriberi
What it is
Beriberi is a thiamine deficiency disorder. It can affect the nervous system, the heart, or both, depending on the clinical presentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include peripheral neuropathy, weakness, edema, tachycardia, or signs of heart failure in severe cases.
When to use this code
Use E51.1 when the provider documents beriberi or clear thiamine deficiency disease. It may apply when the record describes dry, wet, or mixed beriberi, or when the diagnosis is confirmed clinically. Code the condition only when it is explicitly supported in the chart.
Do not use for
Do not use this code for nonspecific malnutrition, vitamin deficiency without beriberi, or suspected thiamine deficiency that is not documented as beriberi. Check documentation.
Coding tip
Look for the provider’s exact wording, since beriberi is often documented under a broader thiamine deficiency diagnosis.