The job of hospitalists closely resembles other physicians, but there's a subtle difference.
Hospitalists are concerned with your care throughout your stay in the hospital, from when you enter to when you leave. Some doctors specialize in certain organs or conditions, like cardiologists and orthopedic surgeons. But for hospitalists, the patient is their specialty.
These professionals undergo the same training as other physicians and are equipped to oversee treatment and monitoring. Hospitalists are also responsible for coordinating with specialist doctors and following up with the patient. Because they are always available in the hospital, admitted patients are likely to see hospitalists more often than any other physician.
If you want to become a hospitalist, you'll first need to undergo medical training - medical school, internship, residency, the works. But instead of selecting a particular specialty, you can opt instead to become a hospitalist, caring for patients as they come through the hospital.