28 U.S.C. § 1346(b)
Part (b) of 28 U.S.C. § 1346 is one portion of the Federal Tort Claims Act, which provides federal tort liability (i.e., medical malpractice) against the United States for the actions of U.S. employees acting in the scope of their employment. For example, this section could be used to bring a malpractice claim in federal court against a federally employed physician or a federal hospital. If you are just beginning to research federal malpractice liability, reading the statute is a good place to start.