If you aren't sure where to start in your research or are having trouble picking a topic, the best place to begin is with current awareness sources. News articles, blogs, and social media are a good way to find current problems within the area of law you are researching. Browse news sources to get ideas, then--once you have narrowed it down--sign up for news alerts on your topic so you can keep on top of developments.
There are health care related practice area concentrations in several commercial databases available to you. These are an excellent place to look over available treatises, find current news stories, and then locate the regulations or statutes that are being discussed.
Professional organizations are a great place to start looking for current events, issues facing practitioners, and conflicts within the health law arena.