Related. Went to an after-hours clinic yesterday after getting some methanol-containing shellac in my eye. Mom drove me. She sprained her ankle a few weeks ago and had her ankle x-ray'd. They billed her $1400 just for the x-ray.
Asked the doctor @ the clinic about it. They are equipped to do the same x-ray and would've charged $50. To have my eye examined under UV, and some other basic tests, cost me $40 (and I'm fine, btw). Pretty darn reasonable. I also waited a much shorter time in the clinic than my mom did in ER (granted, they were at different times, so somewhat non-comparable). He also prescribed me an antibiotic for bronchitis -- $10 for a full prescription, no gov't subsidization.
So, why do hospitals charge 28x more for the same procedure than an apparently-profitable clinic? Valet services? Subsidizing those who can't afford to pay the extreme prices?
ETA: Uncle's home insurance is covering my $40 cost to have eye examined (+having bronchitis looked at in the same visit), so total out-of-pocket cost for me - being uninsured myself - between bronchitis, a prescription, and having my eyes examined for damage after a can of shellac exploded, is $10.