Business and Professions Code section 3731

A person holding a license as a respiratory care practitioner issued by the board shall use the title “respiratory care practitioner” or the letters “RCP”. The license as a respiratory care practitioner shall not authorize the use of the prefix “Dr.”, or the word “doctor”, or any suffix or affix indicating or implying that the licensed person is a doctor or a physician and surgeon.

The suffix “M.D.” shall not be used unless the licensed practitioner is licensed as a physician and surgeon in this state.