I am trying to read my medical card report and looking for code that represents when he got a tetanus shot. Is it TDAP or DPT?

TDAP (Tetanus, Diphtheria, and Acellular Pertussis) is the most likely code for a tetanus shot. DPT (Diphtheria, Pertussis, and Tetanus) is an older vaccine that is no longer commonly used.