There are situations where I completely understand doctors running late. The pediatrics group we went to when our kids were small would “fit you in” if your kid was unexpectedly ill. When you had to wait for a checkup, you knew it was because they were “fitting in” the acutely ill kids. You knew how many sick kids there were, because they were required to stay in a segregated part of the waiting area. In the well kids area, there were all kinds of toys, books, amusements, so as far as the kids were concerned it was just playtime.
Second is an ob/gyn. The group I went to had 3 doctors in it. Sometimes it happened that 2 or even 3 doctors had to attend to deliveries. On a couple of occasions, I recall that the receptionist told us in the waiting room what the situation was, and gave us the option of waiting it out, coming back later, or rescheduling.
My dentist will also “fit in” acute problems, but they schedule his time very, very carefully. I have never, ever, waited more than 10 minutes in his office.
On the other hand: Two GPs I stopped seeing entirely because they didn’t keep appointments. What was especially galling about both was that the front desk staff lied. I called before leaving work early to see if they were running late and they assured me they were not. Got to the office, asked the same question, and was told it would be just a couple of minutes. A half hour later I asked again, same answer. Waited 5 more minutes, then told the desk person, "Sorry, I have another appointment. I’m leaving now. " “Oh, but it will be just another few minutes.” Well, that’s what you told me a half hour ago. 'Bye.
Basically, any doctor who has to deal with emergencies and whose staff keeps you informed accurately, I have no problem with. Otherwise, I’m sorry, it’s just unrealistic scheduling to have to wait more than 15 minutes.
There are a couple of hospitals in our area who guarantee that you WILL be seen by a doctor in the E.R. within 15 minutes. They keep to it, too. Of course, as is only reasonable, once the initial evaluation is done, they do schedule actual treament on a triage basis, so if you’re there with a broken finger you are going to wait for a good while as they tend to the cardiac emergency or the gunshot victim or whatever.