E51.8
BillableOther manifestations of thiamine deficiency
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is E51.8 an HCC code?
No. E51.8 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
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 does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
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, RAF weights, 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.