Healthcare professionals are usually governed by laws and regulations at the state level. Also, there are practice standards for members of health professional associations, that may be both state and national. In addition, there are unions with their own standards.
EXAMPLE
In Florida, there is a state law called the Florida Nurse Practice Act that outlines competencies needed for nurses practicing in Florida and their Scope of Practice. Every state has a similar Act. To make it easier to find the act for any state the regulatory body NCSBN has made them readily available from their website. See below for the link.