As I believe you are still presenting male, a suit if you have it, if not, dress pants and a good dress shirt. There is no need to mention the fact that you are transgender until you are ready to start the transition. Our past is only an issue when we are in transition and records may not be uniform. Were I to apply for a job today I would not mention my medical past unless a security clearance was a part of the job as my records should match up.
