ICD-10 Code E63.9 – Nutritional deficiency, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E63.9 – Nutritional deficiency, unspecified
What it is
E63.9 identifies a nutritional deficiency when the record does not specify which nutrient is lacking. Use it for a general deficiency state, not for a defined vitamin, mineral, or protein deficiency.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include poor intake, weight loss, fatigue, or other nonspecific signs of malnutrition, but the specific deficiency is not named.
When to use this code
Use E63.9 when the provider documents a nutritional deficiency without identifying the exact cause or nutrient involved. It is appropriate when the chart supports deficiency but does not support a more specific code. Check documentation if malnutrition or a named deficiency is recorded instead.
Do not use for
Do not use this code for a documented specific deficiency, such as vitamin or mineral deficiency. Also avoid it when the record supports malnutrition or another clearly stated nutritional disorder.
Coding tip
Before assigning E63.9, look for a more specific deficiency diagnosis in the assessment, problem list, or discharge summary.