Gastroenteritis and colitis due to radiation

This code signifies inflammation of the stomach, small intestine, and/or colon that is a direct consequence of exposure to radiation. This condition can manifest acutely during or shortly after radiation therapy, or chronically, months to years later. It encompasses symptoms such as abdominal pain, nausea, vomiting, diarrhea, and rectal bleeding.

Apply this code when documentation clearly links gastrointestinal inflammation to a history of radiation exposure, typically for cancer treatment. This diagnosis is supported by physician notes detailing the patient's radiation therapy history and presenting GI symptoms consistent with radiation-induced damage.

• Always sequence this code first if it is the primary reason for the encounter.
• Do not confuse with infectious gastroenteritis or colitis (A00-A09) or other non-radiation induced inflammatory bowel conditions.
• Ensure documentation specifies "due to radiation" to justify the use of this specific etiology.