You need an appointment for the first visit only.
If you make an appointment you will usually be quicker than if you just show up, however, if you go without an appointment depending on the number of patients you can be just as quick
I went without an appointment, and there was no problem with that.
They recommend an appointment for your first visit but I've had friends who showed up and were able to go in. The appointment is really beneficial though if you're patient.
I was able to visit without an appointment. There was paperwork to fill out though.
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