There are many different doctors that are able to and can play a role in treating the elderly, including a primary care or family doctor, internal medicine specialist, or even an orthopedic surgeon, as many older adults tend to need knee or hip replacement surgeries. However, there is also a specialty known as geriatrics; these physicians are known as geriatricians, and these are the kinds of doctors that commonly treat the elderly.   Geriatricians have spent their medical training learning about, treating, and managing various health issues that impact older adults specifically. Some geriatricians have further sub-specialties, such as psychiatry or palliative care, and can work in many different environments, such as a hospital, an outpatient clinic, or in their own practice, in conjunction with other healthcare practitioners.