E51: Thiamine deficiency
Codes under E51 (Thiamine deficiency). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| E51.1 | Beriberi | — |
| E51.1 | Beriberi | — |
| E51.2 | Wernicke's encephalopathy | ✓ |
| E51.2 | Wernicke's encephalopathy | ✓ |
| E51.8 | Other manifestations of thiamine deficiency | ✓ |
| E51.8 | Other manifestations of thiamine deficiency | ✓ |
| E51.9 | Thiamine deficiency, unspecified | ✓ |
| E51.9 | Thiamine deficiency, unspecified | ✓ |
| E51.11 | Dry beriberi | ✓ |
| E51.11 | Dry beriberi | ✓ |
| E51.12 | Wet beriberi | ✓ |
| E51.12 | Wet beriberi | ✓ |
Frequently asked questions
What is ICD-10-CM code E51?
E51 is an ICD-10-CM category covering Thiamine deficiency. It contains 12 more specific diagnosis codes, 10 of which are billable.
Is E51 a billable code?
No — E51 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 E51.1 — Beriberi). 10 of the 12 codes under E51 are billable.
What codes fall under E51?
E51 includes E51.1, E51.1, E51.2, E51.2, E51.8, plus 7 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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