We all know that the healthcare system in the United States needs a lot of work. There are so many people without coverage, and the people who do have it are constantly getting screwed over by their providers. Hidden fees, expensive and unnecessary testing, and high deductibles plague people who just want to have a decent quality of life and heal that which ails them. This week, Twitter user @mrs_g_rider tweeted out a disturbing revelation about how her insurance company bills her for ultrasoun…