ICD-10 Code E46 – Unspecified protein-calorie malnutrition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E46 – Unspecified protein-calorie malnutrition
What it is
E46 identifies protein-calorie malnutrition when the record does not specify the type or severity. Use it for general undernutrition involving inadequate protein and calorie intake or absorption.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include weight loss, reduced body mass, poor intake, muscle wasting, or weakness, but you should code only what is documented.
When to use this code
Use E46 when the provider documents malnutrition without naming a more specific form, such as mild, moderate, or severe protein-calorie malnutrition. It also fits when the chart notes undernutrition or protein-calorie malnutrition but gives no further detail. If the documentation is unclear, check documentation before coding.
Do not use for
Do not use E46 when the record specifies a more detailed malnutrition code or another cause of poor nutrition. Do not guess severity or type from weight loss alone.
Coding tip
Query for severity or type when the note says malnutrition but does not clearly support an unspecified diagnosis.