Wikipedia
Defensive medicine, also called defensive medical decision making, refers to the practice of recommending a diagnostic test or treatment that is not necessarily the best option for the patient, but an option that mainly serves the function to protect the physician against the patient as potential plaintiff. Defensive medicine is a reaction to the rising costs of malpractice insurance premiums and patients’ biases on suing for missed or delayed diagnosis or treatment but not for being overdiagnosed. U.S. physicians are at highest risk of being sued, and overtreatment is common. The number of lawsuits against physicians in the USA has increased within the last decades and has had a substantial impact on the behavior of physicians and medical practice. Physicians order tests and avoid treating high-risk patients in order to reduce their exposure to lawsuits, or are forced to discontinue practicing because of overly high insurance premiums. This behavior has become known as defensive medicine, "a deviation from sound medical practice that is indicated primarily by a threat of liability."