ICD-10-CM › E00-E89 › E50-E64 › E51 Thiamine deficiency › E51.9
Thiamine deficiency, unspecified
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Thiamine deficiency, unspecified
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from E51 Thiamine deficiency
Excludes1 - never coded here
- sequelae of thiamine deficiency (E64.8)
Inherited from the E50-E64 section Other nutritional deficiencies (E50-E64)
Excludes2 - not included here
- nutritional anemias (D50-D53)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Deficit
- Avitaminosis
- Hypovitaminosis
- Vitamin deficiency
- Leukoencephalopathy
- Deprivation > vitamins
- Deficiency, deficient > factor
- Defect, defective > coagulation
- Deficiency, deficient > clotting
- Disturbance > absorption > vitamin
- Encephalopathy > in > lack of vitamin
- Deficiency, deficient > clotting factor NEC
- Deficiency, deficient > coagulation NOS > clotting factor NEC
- Aneurin deficiency
- Thiamin deficiency
- Deficiency, deficient > aneurin
- Deficiency, deficient > thiamin, thiaminic
- Deficiency, deficient > vitamin NOS > B1 NOS
- Deficiency, deficient > vitamin NOS > thiamin
Codes in the same group
| Code | Description | Status |
|---|---|---|
| E51.1 | Beriberi | Not billable |
| E51.2 | Wernicke's encephalopathy | Valid |
| E51.8 | Other manifestations of thiamine deficiency | Valid |