Abstract: The present disclosure describes systems and methods for a patient arm support system for medical procedures such as radial catheterization. The support system has a body support board upon which a patient's body rests and an arm support board upon which the patient's arm rests. A pivot plate is provided that is connected to the body support board by a radial pivot hinge such that the pivot plate is rotatable throughout various rotational angles, (?), relative to the body support board. The support system may have an elevational hinge connecting the pivot plate and the arm support board such that the arm support board can be elevated an elevational angle (?) from the pivot plate. The support system may have an arm board stand. The support system may have a rotational bearing material between the pivot plate and the body support board.