An AI system (ChatGPT) was explicitly involved in the use phase, providing diagnostic suggestions based on symptom input. This use directly contributed to the identification of a rare disease, which is a health-related outcome. Although the AI did not cause harm, the event involves realized health impact (correct diagnosis) mediated by AI assistance. According to the definitions, an AI Incident includes events where AI use directly or indirectly leads to injury or harm to health. Here, the AI use led to a positive health outcome, not harm, so it does not meet the harm criteria for an AI Incident. However, since the AI system's involvement is central and relates to health outcomes, and no harm or plausible harm is described, this event is best classified as Complementary Information, as it provides context on AI's role in healthcare diagnosis and patient experience without describing harm or plausible harm.