ICD-10 Code K52.0 – Gastroenteritis and colitis due to radiation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K52.0 – Gastroenteritis and colitis due to radiation
What it is
K52.0 identifies inflammation of the stomach and intestines caused by radiation exposure, usually after therapeutic radiation. Use it when documentation states radiation-induced gastroenteritis or colitis.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include abdominal pain, diarrhea, nausea, or bowel inflammation after radiation therapy.
When to use this code
Use K52.0 when the provider documents gastroenteritis or colitis as a direct effect of radiation. It fits cases tied to current or prior radiation treatment, especially when the causal relationship is clearly stated. If the record only notes nonspecific gastrointestinal symptoms, check documentation before coding this diagnosis.
Do not use for
Do not use this code for infectious gastroenteritis, ulcerative colitis, Crohn disease, or radiation injury without gastrointestinal involvement. If the note does not link the condition to radiation, check documentation.
Coding tip
Code the radiation cause only when the provider explicitly connects the bowel inflammation to radiation exposure.