The most dramatic changes mandated by the Affordable Care Act, aka "Obamacare," kick in by 2014. These companies are poised for big growth as they work with hospitals, insurance providers and others scrambling to hit deadlines.
Republican state lawmakers may not want to expand Medicaid, but some are warming up to the idea of using federal funds to buy private insurance for the poor.
Some doctors are quitting medicine after they find a new passion; others are burned out and fed up with shrinking reimbursements or being overloaded with patients.