Here’s a question: why is patient autonomy so important? It might seem “obvious,” but you might want to make that explicit (something about rights to possession of self) as the source of confidentiality (maintaining the right to self).
Here’s my other big question as the opposing point of view: where is it? Does any respected medical or societal body NOT think that patient autonomy and patient confidentiality as part of that is a right? If not, then you are not proving something here with evidence and making a compelling argument — you are just explaining What Is and why. As Ethicists, we look at What Is and ask if it’s Good and how can we make it Excellent or even Perfect? Yes, sometimes, in an emergency, confidentiality is breached because upholding Life is the first order of business. My brother was hit by a car and unconscious on the street. No one knew who he was or anything about him. A friend was riding by and recognized him, told the cops who he was, and brought them to our house. He was 15, so Mom was his guardian/proxy — so she was the guardian of his autonomy and confidentiality via her and the EMTs and the cops were the guardians of his life and protection in the absence of his consciousness and until Mom got to the hospital.