E51 ICD-10-CM Code: Thiamine deficiency
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
E51Thiamine deficiency
ICD-10-CM diagnosis code · United States clinical modification
Where E51 sits
- 1
Chapter 4
Endocrine, nutritional and metabolic diseases (E00-E89)
- 2
Section
Other nutritional deficiencies (E50-E64)
- 3
Category E51
Thiamine deficiency
- 4
Code E51
Thiamine deficiency
Codes under E51
E51 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for E51.
Code first
No “code first” instruction is listed for E51.
Use additional code
No “use additional code” instruction is listed for E51.
Excludes1
Conditions that should not be reported together with this code.
- sequelae of thiamine deficiency (E64.8)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for E51.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code E51 mean?
E51 is the FY 2027 U.S. ICD-10-CM code for “Thiamine deficiency.”
Is E51 a billable or specific ICD-10-CM code?
No. E51 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is E51 located in ICD-10-CM?
E51 is listed in Chapter 4, Endocrine, nutritional and metabolic diseases (E00-E89), within Other nutritional deficiencies (E50-E64) (E50–E64), under category E51, Thiamine deficiency.
What coding notes are listed for E51?
No inclusion terms are listed for E51 in this reference record. No code-first instruction is listed. Excludes1 notes: sequelae of thiamine deficiency (E64.8). No Excludes2 note is listed.