Vertical integration in medical settings typically involves the merging of independent physicians, physician groups, and hospitals to render an organized health care network. Such systems are considered to be vertical, as they may allow for a seamless continuation of services throughout the range of needs a patient may require. Mergers often result in the redefining of professional services offered in the acquired facility or across the network. As such, mergers have the potential of adversely impacting psychological practices. Professional psychology needs to take a proactive stance in this changing health care landscape. Research regarding empirically validated treatments and effects of psychological interventions on overall health-care costs needs to be properly disseminated to health care administrators to assure their knowledge of the utility of psychological services in the medical setting. Training psychologists to assume leadership positions in health-care institutions, gaining representation on hospital staff boards, and linking psychologists and physicians through collaborative training, to provide improved care, may allow for psychology to influence health care delivery.