This was my experience, too. Hospitals gouge the bejesus from the medically uninsured.
A paradox of medical costs is that people who can least afford them — the uninsured — end up being charged the most. Insurance companies, with large numbers of customers, have the financial muscle to negotiate low rates from health-care providers; individuals do not. Whereas insured patients would have been charged about $900 by the hospital that performed Pat’s biopsy (and pay only a small fraction of that out of their own pocket), Pat’s bill was $7,756. For lab work — and there was a lot of it — he was being charged as much as six times the price an insurance company would pay.