I argue that because bluffing, puffing, and spinning are features of corporate life, they are likely to characterize the doctor-patient relationship in managed care medicine. I show that managed-care organizations (MCOs) and the physicians who contract with them make liberal use of puffing and spinning. In this way, they create a context in which it is likely that patients will also use deceptive mechanisms. Unfortunately, patients risk their health when they deceive their doctors. Using the warranty theory of truth I argue that although bluffing may be ethical in business because all participants agree to it and business has not warranted truth-telling, it is not ethical in a medical context because physicians and MCOs have warranted truth-telling and the quality of medical care depends on it.