ICD-10-CM > E00-E89 > E50-E64 > E51 E51 Thiamine deficiency Non-Billable/Non-Specific Type 1 Excludes sequelae of thiamine deficiency (E64.8) Codes E51.1BeriberiE51.11Dry beriberiE51.12Wet beriberiE51.2Wernicke's encephalopathyE51.8Other manifestations of thiamine deficiencyE51.9Thiamine deficiency, unspecified