ICD-10 Code E53.0 – Riboflavin deficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E53.0 – Riboflavin deficiency
What it is
Riboflavin deficiency is a lack of vitamin B2. Use this code when documentation identifies insufficient riboflavin intake or deficiency causing a nutritional disorder.
Clinical signs
Common findings include angular cheilitis, sore tongue, and skin changes such as dermatitis. Clinical features vary; refer to documentation.
When to use this code
Use E53.0 when the provider documents riboflavin deficiency, ariboflavinosis, or vitamin B2 deficiency. It may apply in malnutrition, restricted diets, or malabsorption when riboflavin deficiency is specifically named. Check documentation if the record only says “vitamin deficiency” without specifying B2.
Do not use for
Do not use this code for other vitamin deficiencies, such as niacin or folate deficiency. Do not assign it when riboflavin deficiency is not clearly documented.
Coding tip
Code E53.0 only when the deficiency is explicitly stated; otherwise, query the provider.