My T just texts me if he's going to be late, which is rarely ever.

Due to my work hectic schedule, i normally can't wait more than 15 mins or so for appointments with any provider. Problem is, I have to pay my copay as soon as I get there, and the provider may not be available for another month and beyond if I don't wait now, so it becomes a hassle trying to get refunded and rescheduled. Because of lack of availability for future appointments, I sometimes end up having to cancel work meetings, inconveniencing my work colleagues.

I once had a psychiatrist who I had to wait 2-3 hours for every_single_time; this was long ago. I had limited insurance provider availability at the time, so when I quit seeing her, I could not find anyone else. I guess I didn't psychiatry that bad anyway.

Unless you are an OBGYN or other type of provider called out to emergencies that can't be filled by on call providers, keeping a sloppy schedule is unprofessional and disrespectful of others' time.