ICD-10 Code E61.1 – Iron deficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E61.1 – Iron deficiency
What it is
E61.1 identifies iron deficiency, meaning the body does not have enough iron for normal function. Use it when the record documents iron deficiency, with or without anemia.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include fatigue, pallor, reduced exercise tolerance, and other signs consistent with low iron stores.
When to use this code
Use E61.1 when the clinician documents iron deficiency as a diagnosis, problem, or assessment. It may apply even if anemia is not yet present. Code the documented condition rather than inferring it from a supplement order alone.
Do not use for
Do not use this code for iron deficiency anemia, which is coded separately. Do not assign it when the chart only mentions screening, suspected deficiency, or iron therapy without a documented diagnosis.
Coding tip
Check whether the provider documented iron deficiency alone or iron deficiency anemia, and code the stated condition exactly.