2019 ICD-10-CM Diagnosis Code E51.9

Thiamine deficiency, unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • E51.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM E51.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of E51.9 - other international versions of ICD-10 E51.9 may differ.
The following code(s) above E51.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to E51.9:
  • E00-E89
    2019 ICD-10-CM Range E00-E89

    Endocrine, nutritional and metabolic diseases

    Note
    • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
    Type 1 Excludes
    • transitory endocrine and metabolic disorders specific to newborn (P70-P74)
    Endocrine, nutritional and metabolic diseases
  • E50-E64
    2019 ICD-10-CM Range E50-E64

    Other nutritional deficiencies

    Type 2 Excludes
    Other nutritional deficiencies
  • E51
    ICD-10-CM Diagnosis Code E51

    Thiamine deficiency

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • sequelae of thiamine deficiency (E64.8)
    Thiamine deficiency
Approximate Synonyms
  • Thiamin deficiency
Clinical Information
  • A nutritional condition produced by a deficiency of thiamine in the diet, characterized by anorexia, irritability, and weight loss. Later, patients experience weakness, peripheral neuropathy, headache, and tachycardia. In addition to being caused by a poor diet, thiamine deficiency in the United States most commonly occurs as a result of alcoholism, since ethanol interferes with thiamine absorption. In countries relying on polished rice as a dietary staple, beriberi prevalence is very high. (from cecil textbook of medicine, 19th ed, p1171)
  • Nutritional condition produced by a deficiency of thiamine in the diet, characterized by anorexia, irritability, and weight loss; later, patients experience weakness, peripheral neuropathy, headache, and tachycardia; in addition to being caused by a poor diet, thiamine deficiency in the United States most commonly occurs as a result of alcoholism, since ethanol interferes with thiamine absorption.
ICD-10-CM E51.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 640 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes with mcc
  • 641 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes without mcc

Convert E51.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to E51.9:

ICD-10-CM Codes Adjacent To E51.9
E50.6 Vitamin A deficiency with xerophthalmic scars of cornea
E50.7 Other ocular manifestations of vitamin A deficiency
E50.8 Other manifestations of vitamin A deficiency
E50.9 Vitamin A deficiency, unspecified
E51 Thiamine deficiency
E51.1 Beriberi
E51.11 Dry beriberi
E51.12 Wet beriberi
E51.2 Wernicke's encephalopathy
E51.8 Other manifestations of thiamine deficiency
E51.9 Thiamine deficiency, unspecified
E52 Niacin deficiency [pellagra]
E53 Deficiency of other B group vitamins
E53.0 Riboflavin deficiency
E53.1 Pyridoxine deficiency
E53.8 Deficiency of other specified B group vitamins
E53.9 Vitamin B deficiency, unspecified
E54 Ascorbic acid deficiency
E55 Vitamin D deficiency
E55.0 Rickets, active
E55.9 Vitamin D deficiency, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.