There is some wait...I don't believe there is "no wait" ever..
I am basing this off threads from Candaidans that have commented on waiting of upwards of 7 months to see a specialist about some kind of gastrointestial disorder. Is this anecdotal, maybe. I am certain the wait depends on the number of doctors available in your area.
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Here's an example of a health choice I am making. I recently started training rather strenously because I wanted to run a 5k. In the process, I have developed some sort of injury to my knee which causes pain when I run. My PCP referred me to a specialist (who I will see in 7 total days from my visit with my PCP) who I *think* will reccomend me getting a MRI. I think all I need is a brace. The MRI will cause me to have some money out of pocket, whereas a consultation where I may just need a brace is essentially covered. In a system where medical care was free, I'd just get the MRI, but because I have to pay for it, I am making choices that lower the cost for everyone. I am sure the results of the MRI will say I need a brace. So, why not fit for the brace now, and if that proves to be ineffective, go for the MRI later.