ICD-10 Code E53.8 – Deficiency of other specified B group vitamins (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E53.8 – Deficiency of other specified B group vitamins
What it is
E53.8 identifies a deficiency of a B vitamin that does not have its own more specific ICD-10 code. Use it when documentation names another specified B vitamin deficiency, but not folate, niacin, riboflavin, thiamine, or B12.
Clinical signs
Clinical features vary; refer to documentation. B vitamin deficiencies may present with nonspecific fatigue, poor intake, neurologic complaints, or mucocutaneous findings, depending on the vitamin involved.
When to use this code
Use E53.8 when the record clearly states a deficiency of another specified B group vitamin and no more specific code applies. It is appropriate for confirmed or clinician-documented deficiency diagnoses, including follow-up visits for the same condition. Check documentation when the exact vitamin is unclear.
Do not use for
Do not use E53.8 for folate deficiency, niacin deficiency, riboflavin deficiency, thiamine deficiency, or vitamin B12 deficiency, because those have separate codes. Do not use it when the chart only suggests poor nutrition without a documented deficiency.
Coding tip
Match the code to the exact B vitamin named in the note, and default to E53.8 only when the deficiency is specified but not separately coded.