This work presents a clear structure and concise form, covering the entire law of social security as it pertains to physicians. It explains the social law content of fundamental concepts such as illness, disability, inability to work, professional incapacity, helplessness, and need for care, as well as accidents, degree of disability (MdE), and degree of impairment (GdB). It introduces the social law theory of causality and succinctly outlines the Social Code and other social laws, detailing the legal prerequisites for all important social benefits. Additionally, it provides numerous practical tips to clarify the legal foundations of social medical assessments. The focused, practice-oriented presentation and explanations, written in a language that is also understandable for non-lawyers, along with numerous schematic representations, facilitate the physician's entry into this initially unfamiliar subject matter.