 The law intervenes to regulate the duty to treat, that essentially is ruled by contract law, which gives a doctor the right to refuse treatment, in the absence of an emergency, when no previous doctor-patient relationship existed.However Doctors cannot discriminate because of disability, ADA, abandon a patient, or not render services in an emergency according to EMTALA (it aims doctors in emergency rooms, where they need to screen, stabilize and transfer.It also regulates the fiduciary duties of doctor-patient, such as privacy HIPAA, informed consent (battery unlawful touch), conflict of interests, (Moore case), etc.