Malnutrition ICD-10-CM Codes

Malnutrition ICD-10-CM Codes

Learn about the essential ICD-10 codes for malnutrition that you can use through this guide.

By Matt Olivares on Aug 8, 2025.

Fact Checked by Karina Jimenea.

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What ICD-10 codes are used for malnutrition?

Malnutrition is a broad term encompassing various conditions resulting from insufficient or imbalanced nutrient intake, which is detrimental to optimal health. Here, we delve into the most frequently used ICD-10 codes for malnutrition, providing clinical descriptions for each:

  1. E40 - Kwashiorkor: This code denotes severe protein malnutrition, mainly observed in children suffering from dietary insufficiency. Edema, irritability, an enlarged liver, and skin changes typically characterize Kwashiorkor.
  2. E41 - Nutritional marasmus: Marasmus, indicated by this code, is a form of extreme malnutrition caused by a significant deficit in energy intake compared to the energy required. It usually presents substantial weight loss, muscle wasting, and weakened immunity.
  3. E42 - Marasmic kwashiorkor: This code is utilized when a patient displays symptoms of both Kwashiorkor and Marasmus, signaling extreme malnutrition. Patients often exhibit signs of both protein deprivation and caloric insufficiency.
  4. E43 - Unspecified severe protein-calorie malnutrition: This code is used when a patient suffers from severe malnutrition, and it's not specified as Kwashiorkor, Marasmus, or Marasmic Kwashiorkor. It typically applies to patients with extreme weight loss, reduced muscle mass, and nutrient deficiencies without a more specific diagnosis.
  5. E44.0 - Moderate protein-calorie malnutrition: This code is appropriate when a patient exhibits noticeable but not extreme signs of malnutrition. Symptoms might include moderate weight loss, lower resistance to infection, and general fatigue.
  6. E44.1 - Mild protein-calorie malnutrition: This code is employed when a patient has mild malnourishment, which may manifest as slight weight loss and minor reductions in muscle tissue.
  7. E46 - Unspecified protein-calorie malnutrition: This code represents situations where a patient shows signs of malnourishment but it's not classified as mild, moderate, or severe. It's often used when the extent of malnutrition isn't identifiable.

Which malnutrition ICD codes are billable?

All the above-mentioned ICD-10 codes for malnutrition are billable codes.

Clinical information

Malnutrition, a critical health issue, is characterized by an array of conditions that stem from the following factors:

  • Inadequate or unbalanced diet: A diet lacking essential nutrients or not providing a balanced intake of proteins, carbohydrates, and fats can lead to malnutrition.
  • Digestive issues: Problems with digestion or absorption, such as Crohn's disease, celiac disease, or chronic diarrhea, can prevent the body from effectively utilizing the nutrients in consumed food.
  • Endocrine, nutritional, and metabolic diseases: Certain medical conditions, like cancer, liver disease, or any illness with severe symptoms, can impact appetite and lead to malnutrition.

The implications of malnutrition are severe and wide-ranging, including:

  • Stunted growth: Malnutrition during childhood can result in stunted physical and cognitive growth.
  • Eye problems: Vitamin A deficiency can cause eye problems, including night blindness and a higher risk of infections.
  • Diabetes and heart disease: Long-term malnutrition can lead to chronic diseases like diabetes and heart disease due to the body's insufficient nutrient reserves.
  • Mortality: In severe cases, malnutrition can be life-threatening.

To treat malnutrition, healthcare professionals typically recommend the following:

  • Balanced diet: Providing a healthy, balanced diet rich in necessary nutrients is the first line of treatment.
  • Dietary supplements: In cases where dietary changes aren't sufficient or possible, nutrient-rich dietary supplements may be prescribed to help meet the person's nutritional needs.

Synonyms include

  • Nutritional deficiency
  • Nutritional deficiency NOS (not otherwise specified)
  • Starvation
  • Undernutrition
  • Protein-energy malnutrition
  • Protein-calorie imbalance NOS (not otherwise specified)
  • Caloric malnutrition

Popular search terms for malnutrition ICD 10 CM codes

  • Malnutrition ICD-10 codes
  • ICD-10 malnutrition
  • Malnutrition diagnosis codes
  • ICD-10 codes for malnutrition

Commonly asked questions

Malnutrition ICD codes should be used when a patient is diagnosed with any form of malnutrition, ranging from mild to severe.

Treatments typically involve dietary modifications to ensure adequate intake of necessary nutrients. This may include a balanced diet or dietary supplements.

A diagnosis code for malnutrition means that the patient has been diagnosed with a form of malnutrition, which could range from mild to severe.

Related ICDs

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