A pediatrician is a doctor who specializes in the regular care of children, as well as the diagnosis and treatment of illness in children. Young patients are often more complicated to treat because they are still growing and developing.
While pediatricians may sub-specialize in specific therapy areas like oncology, surgery, ophthalmology, and anesthesiology, in general, pediatricians provide services like vaccinations, health exams, and treatment of common ailments and injuries. In addition, pediatricians are trained to handle the complex emotional and behavioral issues faced by children, especially during puberty.
Pediatricians normally see their patients from birth until the age of 18, although some may agree to treat patients into their early 20s, if requested.

Hospitalists are physicians who specialize in the care of patients in the hospital. The majority of hospitalists are board-certified internists and have completed the same training as other internal medicine doctors including medical school, residency and board certification examination.
Hospitalist activities include patient care, teaching, research, and leadership related to hospital care. They have more expertise in caring for complicated hospitalized patients on a daily basis since, unlike other specialists or primary care doctors, they spend most of their day in the hospital.
They often coordinate the care of their patients and act as the central point of communication among the different doctors and nurses involved in the patient's care. They are also the main physician for family members to contact for updates on a loved one.

Hospice care & Palliative medicine specialists focus their practice on pain management, symptom relief and qualify-of-life treatments to relieve the suffering of terminally ill patients. These doctors have specialized expertise in the treatment of patients with serious illnesses, advanced diseases and conditions resulting from catastrophic injury. Though often they work within hospice settings, they prevent and alleviate suffering appropriate at any age and stage of disease and can work alongside practitioners providing curative treatments.
Hospice care & Palliative medicine focuses on depression, pain, fatigue, constipation, nausea, shortness of breath, loss of appetite and difficulty sleeping, among other conditions. They also alleviate psychosocial distress and other stressors that accompany terminal illnesses. They are skilled in guiding families through legal and ethical decision-making in end-of-life care and can address spiritual issues at these times. By coordinating care across settings by improving communication among providers, they improve access to information for families so that they understand the patient's condition and treatment options.