1. It's actually an EXTRA $100 billion per year - "Because our doctors are paid, on average, more than $250,000 a year (even after malpractice insurance and other expenses), and more than 900,000 doctors in the country" - the TOTAL we spend is about ~$240 billion dollars
2. That is SALARY ONLY. You aren't including the fully loaded cost of doctors: many get large Christmas bonuses, company stock, health care - that could easily be an average of 75k more per doctor