After my recent experience with medical billing for a colonoscopy I'm a bit more sensitive to the shenanigans by hospitals and other medical facilities.
Here is a summary of an article on Marketwatch.com where a women was given an estimated charge of $143,396.66 by Stanford Health Care hospital system for a breast biopsy. (This happens to be down the street from where I had my colonoscopy done - must be something in the water.) She ended up paying $7,750 and the insurance company was billed $67,088. According to the article, the $7,750 would have covered the entire cost of the procedure at Surgery Center of Oklahoma. The article goes on to talk about using MDsave, MyMedicalShopper and SurgiPrice to get transparent pricing - something I'll have to look into the next time I need medical services.
Here is the link to the article: