To clarify my point, the prices causing less than minimum wage income were
for those procedures only. Other procedures paid more, but often not enough. On average, Medicare pays about 80% of what an insurance company will typically pay.
Try finding a doctor while on Medicare; depending on region and specialty, only 2/5 to 2/3 doctors will take patients on Medicare.
One other thing you may have missed: salaries are for doctors working at hospitals or clinics. Doctors working at private practices typically are self employed (or co-operate as a partner) and so are much more directly impacted by low payment rates.
Edit: it is worth pointing out that the requirements to become a doctor are pretty extreme. You first need a 4 year bachelor's degree, then need to go to medical school (costing a total anywhere from 150k to 400k on the extreme high end), followed by residency (basically, a paid internship at a salary lower than a full doctor) lasting 3-7 years.
