Thiamine (vitamin B1) deficiency
Also known as: Vitamin B1 deficiency, unspecified
General information only. Anpheros does not diagnose and does not recommend treatment. Talk to a doctor or pharmacist about your situation. In an emergency, call 112 (or your local emergency number).
In short
Thiamine, also known as vitamin B1, is one of the B vitamins that help the body get or make energy from food and help form red blood cells. These vitamins can be obtained from proteins such as fish, poultry, meat, eggs, and dairy products, as well as from leafy green vegetables, beans, peas, and fortified cereals or breads. Not getting enough of certain B vitamins can cause diseases.
Source: MedlinePlus, National Library of Medicine.
AI-generated summary of the sources cited on this page, checked automatically against them. Not reviewed by a clinician; not medical advice.
Codes
Description
The 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 breads have added B vitamins.
Not getting enough of certain B vitamins can cause diseases. A lack of B12 or B6 can cause anemia.
Next to it in ICD-10
- E27Other adrenal gland disorders
- E28Ovarian dysfunction, unspecified
- E30Disorders of puberty
- E52Vitamin B3 deficiency, unspecified
- E53Other B vitamin deficiencies (including B12 and folate)
- E55Vitamin D Deficiency
Neighbouring codes in the classification, not a medical link.
External resources
Questions
What is the ICD-10 code for Thiamine (vitamin B1) deficiency?
E51 (WHO, International Classification of Diseases, 10th Revision).
What is the ICD-11 code for Thiamine (vitamin B1) deficiency?
5B5A.Z: Vitamin B1 deficiency, unspecified (WHO, ICD-11 for Mortality and Morbidity Statistics).
Sources and attribution
- ICD-11 for Mortality and Morbidity Statistics, © World Health Organization, licensed under CC BY-ND 3.0 IGO.
- Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
- Source: MedlinePlus, National Library of Medicine.
- ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).
Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →
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