As world president of the International College of Surgeons, an organization with branches in over 130 countries, he is often invited to give testimony and advice to committees of the World Health Organization. But he can only pass on Taiwan's desire to join the WHO at private meetings with friends in his role as "a doctor from Taiwan."
由李俊仁擔任世界理事長的國際外科學會，在世界一百三十多個國家擁有分會，他常常代表國際外科學會受邀在 WHO 的一些委員會擔任學術諮詢工作，但卻只能在私下交誼場合以「台灣來的醫生」身分，傳達台灣希望加入 WHO 的願望。