By with the exception of Doctors of Medicine and Doctors of Osteopathic Medicine), we typically refer to folks with advanced degrees as Mr. or Ms., rather than Doctor or Magister (for master's degree).
Many more examples exist. Physical therapists hold DPT (Doctor of Physical Therapy) degrees, and I've never had one introduce him, or herself as "doctor". If one holding a DPA degree (Doctor of Pubic Administration) introduced her or himself as "doctor", there might be muffled chuckling in the audience.
My error. I thought you could only use the ‘Doctor” title if you had a PhD.