ICD-10 Code E44.1 – Mild protein-calorie malnutrition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E44.1 – Mild protein-calorie malnutrition
What it is
E44.1 identifies mild protein-calorie malnutrition, a condition where inadequate intake or absorption of calories and protein has led to early nutritional deficiency. It reflects a mild degree of undernutrition, not severe wasting.
Clinical signs
Common findings include recent weight loss, reduced muscle mass, poor dietary intake, and signs of low nutritional reserves. Clinical features vary; refer to documentation.
When to use this code
Use E44.1 when the record clearly documents mild protein-calorie malnutrition or equivalent wording such as mild undernutrition. You may also use it when the provider links the condition to poor intake, chronic illness, or malabsorption. Check documentation if severity is not stated.
Do not use for
Do not use this code for simple weight loss, dehydration, or unspecified nutritional deficiency without malnutrition documented. Do not assign it when the chart indicates moderate or severe malnutrition instead.
Coding tip
Code the documented severity exactly; if the note only says malnutrition, query for clarification before assigning E44.1.