This must a a US thing - I have never seen an advert on TV for a healthcare clinic of any sort that I can recall. I saw a poster at a cinema recently for a medical clinic, which I remember as it was so unusual.
They are actually quite common in the US. You'll often drive by billboards on the freeway where hospitals claim "No more than a 30 min wait in our emergency rooms!"
I personally think it's a good thing.