E51.8 ICD-10-CM Code: Other manifestations of thiamine deficiency
E51.8 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Other nutritional deficiencies (E50-E64)
E51.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther manifestations of thiamine deficiency
This code represents other less common manifestations of thiamine deficiency not classified elsewhere, such as specific neurological or metabolic complications.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for E51.8. Check the code and parent instructions in the Code Book.
Excludes 2
Official- nutritional anemias (D50-D53)Inherited from E50-E64
Related Codes
Includes
OfficialNo Includes notes are included in this display for E51.8. Check the code and parent instructions in the Code Book.
Excludes 1
Official- transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E51
- sequelae of thiamine deficiency (E64.8)Inherited from E00-E89, E51
Code First
OfficialNo Code First sequencing instructions are included in this display for E51.8. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for E51.8. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for E51.8. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is E51.8 an HCC code?
No. E51.8 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- E51.8
- Description
- Other manifestations of thiamine deficiency
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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What This Code Means
E51.8 is the ICD-10-CM diagnosis code for other manifestations of thiamine deficiency. This code represents other less common manifestations of thiamine deficiency not classified elsewhere, such as specific neurological or metabolic complications. E51.8 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering other nutritional deficiencies (e50-e64).
E51.8 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Use this code only when the specific manifestation doesn't fit E51.11, E51.12, or E51.2.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E51.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.