E51
Non-billableThiamine deficiency
E51 is the ICD-10-CM code for Thiamine deficiency. It is a non-billable category code — use a more specific child code such as E51.1 for billing.
- Status
- Header (non-billable)
- Chapter
- E00-E89
- Subcodes
- 4
- Edition
- FY2026
E00-E89 Endocrine, nutritional and metabolic diseases
What this means — in plain language
MedlinePlus · NIHThe B vitamins are: B1 (thiamine) B2 (riboflavin) B3 (niacin) B5 (pantothenic acid) B6 B7 (biotin) B12 Folic acid These vitamins help the process your body uses to get or make energy from the food you eat. They also help form red blood cells. You can get B vitamins from proteins such as fish, poultry, meat, eggs, and dairy products. Leafy green vegetables, beans, and peas also have B vitamins. Many cereals and some…
Read more about B Vitamins at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •sequelae of thiamine deficiency (E64.8)
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Frequently asked questions
- What is ICD-10 code E51?
- E51 is the ICD-10-CM code for "Thiamine deficiency". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
- Is E51 a billable code?
- No — E51 is a non-billable header code. Use a more specific child code (such as E51.1) for billing.
- What is excluded from E51?
- Excludes1 (not coded here): sequelae of thiamine deficiency (E64.8).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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