Gastroenteritis and colitis due to radiation

This code describes inflammation of the stomach, small intestine, and/or large intestine that is a direct result of exposure to radiation. This condition can manifest with symptoms such as nausea, vomiting, diarrhea, abdominal pain, and malabsorption, varying in severity based on radiation dose and duration.

Use this code when documentation clearly indicates gastroenteritis or colitis as a direct consequence of radiation therapy, accidental radiation exposure, or other radiation-induced injury. This diagnosis requires a causal link between radiation and the gastrointestinal inflammation.

• Ensure documentation explicitly links the GI inflammation to radiation exposure.
• Do not use for gastroenteritis from other causes (e.g., infectious, toxic).
• Consider sequencing this code after the primary malignancy code if the radiation was for cancer treatment.