Yes, I would think so.In Korea, we rarely say "my doctor" or "my dentist" and I think it's because of different medical systems between Korea and North America - I used to live in Canada. In Canada, I couldn't go to a clinic directly, but by way of a family doctor who issues a referral; In Korea, we can go to any clinic or hospital without a referral.
So is that why you say "my doctor" and even "my dentist"? Does the following "his dentist" refer to his regular one?
ex)One day, a patient went to his dentist's office. During the patient's treatment, the dentist asked him...
Student or Learner