K52.22 Food protein-induced enteropathy

Name of the Condition

• Common Name: Food Protein-Induced Enteropathy
• ICD Code: K52.22

Summary

Food protein-induced enteropathy is a gastrointestinal condition characterized by inflammation of the small intestine due to an adverse reaction to dietary proteins. This condition typically presents with chronic or recurrent gastrointestinal symptoms following the ingestion of specific food proteins, leading to malabsorption and nutrient deficiencies in some cases.

Causes

The condition is triggered by an immune-mediated reaction to ingested food proteins, such as those found in cow's milk, soy, wheat, or eggs. The immune system mistakenly identifies these proteins as harmful, resulting in intestinal inflammation and impaired absorption.

Risk Factors

• Family history of food allergies or atopic diseases.
• Early introduction of certain foods to infants.
• Underlying gastrointestinal conditions that increase sensitivity.
• Exposure to multiple potential food allergens in the diet.

Symptoms

• Chronic diarrhea or loose stools.
• Abdominal pain and bloating.
• Failure to thrive or poor weight gain (especially in children).
• Vomiting or feeding difficulties.
• Malabsorption-related symptoms (e.g., anemia, edema).

Diagnosis

Diagnosis involves a thorough medical history, dietary assessment, and exclusion of infectious or structural causes through stool tests and imaging. Endoscopy with biopsy may be performed to evaluate intestinal inflammation. Elimination diets followed by food challenges can help identify specific triggers.

Treatment Options

• Strict avoidance of identified trigger foods.
• Nutritional support, including supplements or specialized formulas.
• Corticosteroids or immunomodulators in severe cases to reduce inflammation.
• Monitoring for growth and nutritional status, particularly in pediatric patients.

Prognosis and Follow-Up

Most individuals improve with dietary management, though some may require long-term avoidance of trigger foods. Regular follow-up is important to assess growth, nutritional status, and response to dietary changes. Many children outgrow the condition by early childhood, but adults may have persistent sensitivity.

Complications

• Malnutrition or growth failure (in children).
• Dehydration from chronic diarrhea.
• Secondary lactose intolerance.
• Delayed development due to nutrient deficiencies.

Lifestyle & Prevention

• Identify and eliminate trigger foods through dietary tracking or allergy testing.
• Read food labels carefully to avoid hidden allergens.
• Work with a dietitian to ensure balanced nutrition while avoiding triggers.
• Consider hypoallergenic formulas for infants with severe reactions.

When to Seek Professional Help

Seek medical attention if symptoms persist despite dietary changes, or if there are signs of dehydration, weight loss, or failure to thrive. Immediate care is needed for severe reactions, such as anaphylaxis, though this is rare in enteropathy.

Tips for Medical Coders

Document the specific food protein trigger when known, as this supports clinical correlation and coding accuracy. Include details of diagnostic tests (e.g., endoscopy, biopsy) and dietary management in the record. Ensure the code K52.22 is used only when the condition is specifically attributed to food protein-induced enteropathy, not other forms of noninfective gastroenteritis.