ICD-10 Code K52.22 – Food protein-induced enteropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K52.22 – Food protein-induced enteropathy
What it is
K52.22 identifies enteropathy caused by a food protein reaction, usually affecting the small intestine. It is used when the record documents a non-IgE-mediated gastrointestinal allergy pattern rather than simple intolerance.
Clinical signs
Typical findings include chronic diarrhea, poor weight gain, vomiting, and signs of malabsorption in an infant or child. Clinical features vary; refer to documentation.
When to use this code
Use K52.22 when the clinician documents food protein-induced enteropathy or a comparable diagnosis involving intestinal injury from food protein exposure. You may also use it when the record clearly supports this condition with allergy evaluation or specialist assessment. Check documentation if the note is vague about the specific allergic disorder.
Do not use for
Do not use this code for lactose intolerance, nonspecific gastroenteritis, or isolated vomiting without documented enteropathy. Do not assign it when the chart only states food allergy without intestinal involvement.
Coding tip
Code from the provider’s exact wording and verify that enteropathy, not another food-related disorder, is documented.