Healthcare, as an industry, is huge. It includes things like:
While it sounds like a great deal of ground to cover, the good news is that researching healthcare companies and industries is similar to any other company and industry research. The databases are pretty much the same.
There are several databases that are useful for researching the government and regulatory side of health-care. Lexis and Westlaw can be used to find law review articles on issues related to health-care and the law. Law reviews are scholarly articles written by attorneys, judges, law professors and law students.
Lexis and Westlaw can also be used to find case law, statutes and regulations that affect the healthcare industry. Both state and federal ones.
LexisNexis Congressional can be used to research pending bills along with legislative history materials (committee prints, markups/versions of a bill, bill forecasting reports, and more.
Peer-reviewed articles, news, business, and legal sources, including U.S. Supreme Court decisions, dating back to 1790.
Link to Safari e-books. These are mostly business, technology, leadership, management and finance related. Can be useful starting points for understanding and issue or topic in a general way.