The federal government regulates NP practice through statutes enacted by Congress, regulations written by federal agencies, policies. Guidelines written by federal agencies.
Federal law preempts state law, when federal.
State law conflict, the state law will not have effect. Care of hospitalized patients insofar as participation by hospitals in the Medicare program is contingent on a hospital's following certain regulations. Care of residents of nursing homes. Self-referral by health care providers, under the Stark Acts. Confidentiality of information about patients.