ICD-10-CM>E00-E89>E50-E64>E52E52Niacin deficiency [pellagra]Billable/Specific Copy Code Copy DescriptionApplicable ToNiacin (-tryptophan) deficiencyNicotinamide deficiencyPellagra (alcoholic)Type 1 Excludessequelae of niacin deficiency (E64.8)