Federal prosecutors have issued subpoenas for the House Ways and Means Committee and a top healthcare aide as part of an investigation into an alleged leak of sensitive Medicare policy news. The Justice Department and the Securities and Exchange Commission are probing whether government officials illegally passed on information that led to a surge in insurance stocks before a major Medicare policy announcement last spring. The subpoenas are part of a developing grand-jury probe, according to The Wall Street Journal, which first reported the news. Prosectors are seeking documents from Ways and Means and testimony from the staff director of its Health subcommittee, Brian Sutter.