Because of the threat of medical malpractice suits, many physicians are subjecting their patients to unnecessary medical testing  Physicians want to be able to explain their actions if anything goes wrong, and they want to be able to show that they tried everything to properly diagnose and treat an ailment  It is difficult for physicians to judge exactly how thorough they need to be in order to avoid potential liability
It is generally wise, ttherefore, for patients to avoid going to a physician unless the patients are very sick
Most insurance companies subsidize the additional expense associated with unnecessary medical tests.