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 2 Wernicke's encephalopathy
 * E51.8 Other manifestations of thiamine deficiency
 * E51.9 Thiamine deficiency, unspecified

E52 Niacin deficiency [pellagra]

 * Includes: niacin (-tryptophan) deficiency
 * nicotinamide deficiency
 * pellagra (alcoholic)
 * Excludes1: sequelae of niacin deficiency (E64.8)

E53 Deficiency of other B group vitamins

 * Excludes1: sequelae of vitamin B deficiency (E64.8)
 * E53.0 Riboflavin deficiency
 * Ariboflavinosis
 * Vitamin B2 deficiency
 * E53.1 Pyridoxine deficiency
 * Vitamin B6 deficiency
 * Excludes1: pyridoxine-responsive sideroblastic anemia (D64.3)
 * E53.8 Deficiency of other specified B group vitamins
 * Biotin deficiency
 * Cyanocobalamin deficiency
 * Folate deficiency
 * Folic acid deficiency
 * Pantothenic acid deficiency
 * Vitamin B12 deficiency
 * Excludes1: folate deficiency anemia (D52.-)
 * vitamin B12 deficiency anemia (D51.-)
 * E53.9 Vitamin B deficiency, unspecified

E54 Ascorbic acid deficiency

 * Includes: deficiency of vitamin C
 * scurvy
 * Excludes1: scorbutic anemia (D53.2)
 * sequelae of vitamin C deficiency (E64.2)

E55 Vitamin D deficiency

 * Excludes1: adult osteomalacia (M83.-)
 * osteoporosis (M80-)
 * sequelae of rickets (E64.3)
 * E55.0 Rickets, active
 * Infantile Osteomalacia
 * Juvenile Osteomalacia
 * Excludes1: celiac rickets (K90.0)
 * Crohn's rickets (K50.-)
 * hereditary vitamin D-dependent rickets (E83.32)
 * inactive