Endocrinologists are medical professionals who specialize in glands and the hormones they produce. They also deal with chemical processes in the body and how they help the body turn food into energy, grow, heal, and function. They help treat a variety of illnesses and diseases like diabetes, thyroid diseases etc.

A hospitalist is a doctor who works only in a hospital setting. Hospitalists care for patients who are staying in the hospital to recover from an illness or a surgery. Most hospitalists are also internists, and many primary care doctors are hospitalists. Some of them also work in subspecialties or have work in other areas early in their careers. Hospitalists coordinate care for patients admitted in the hospital. They play the role of Primary care doctors in hospital settings.