 - Treatment for Hepatitis C has changed a lot in the past 2 years. Most of this change comes from a combination of medicines that is yielding high cure rates. But its long-term effects are uncertain. One problem is that a lot of people need the treatment, but only a few specialists can give it. The success rate for Hepatitis C treatment by primary care doctors, nurse practitioners, or physician assistants is largely unknown. Researchers want to see how provider type affects treatment outcomes. They will conduct a large, community-based study in the District of Columbia. 