Internal medicine is a medical specialty that focuses on the diagnosis, treatment, and care of adults with a wide range of conditions. Internal medicine physicians, also known as internists or doctors of internal medicine, are experts in managing complex chronic conditions and severe long-term illnesses. They can practice in both hospital and outpatient settings, and may work with patients throughout their adult lives. 

Internal medicine is a form of primary care, and can be a good option for patients who want a provider to manage their overall health care. Internal medicine physicians can help patients navigate the health care system and connect them with resources and services.