ICD-10 Code E55 – Vitamin D deficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E55 – Vitamin D deficiency
What it is
E55 identifies vitamin D deficiency, a condition where the body has too little vitamin D to support normal calcium and bone health. It may be documented as deficiency or insufficiency; check documentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings may include bone pain, muscle weakness, or signs of impaired bone mineralization, but the record should support the diagnosis.
When to use this code
Use E55 when the provider documents vitamin D deficiency as the diagnosis, whether newly identified or ongoing. It also fits when deficiency is the focus of evaluation or follow-up. If the note only mentions low vitamin D without a diagnosis, check documentation.
Do not use for
Do not use E55 for routine screening, suspected deficiency, or unrelated abnormal lab results alone. If the record specifies another underlying disorder or a different vitamin D-related condition, code that instead.
Coding tip
Assign E55 only when the provider clearly documents vitamin D deficiency, and verify whether a more specific subcode is required by the chart.