ICD-10 Code E56.1 – Deficiency of vitamin K (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E56.1 – Deficiency of vitamin K
What it is
E56.1 identifies vitamin K deficiency, a lack of this fat-soluble vitamin needed for normal blood clotting. Use it when documentation states vitamin K deficiency or hypovitaminosis K.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include easy bruising, prolonged bleeding, or other evidence of impaired coagulation from low vitamin K.
When to use this code
Use this code when the provider documents vitamin K deficiency as a diagnosis, including nutritional deficiency or deficiency related to reduced intake or absorption. It may also apply when the record explicitly links bleeding concerns to vitamin K deficiency. If the chart only mentions suspected deficiency, check documentation.
Do not use for
Do not use E56.1 for routine vitamin supplementation, prophylaxis, or unspecified bleeding without documented deficiency. If the record names another cause of coagulopathy, code that condition instead.
Coding tip
Code E56.1 only when vitamin K deficiency is clearly documented; otherwise, query the provider.