Critical care is provided for patients who are suffering from life-threatening conditions. The doctors who work with these people are often called intensivists. They focus on a range of different issues, so they can serve people who need immediate and life-saving care. Since people who need critical care are suffering from such a wide variety of issues, intensivists must have a thorough understanding of diverse types of medical issues and the devices and medications needed to treat them.

Otolaryngologists are more commonly called ENTs, which stands for ear, nose, and throat. ENTs are medical professionals that are trained to diagnose and treat diseases and illnesses that affect the ear, nose, throat, and related structures of the head and neck. They can treat serious diseases, such as cancer, or simple health problems, such as strep throat.

A nephrologist is a medical professional who specializes in diagnosing and treating diseases and disorders that affect the kidneys. Nephrologists are often referred to as kidney specialists. Some nephrologists also do research that helps them learn more about kidney diseases, so they can produce better treatments for their patients.

A plastic surgeon is a medical professional who specializes in reconstructing and improving physical appearances. They may also perform reconstructive surgery on patients who have had accidents or health problems that have caused them to need a prosthesis or another type of surgery. When someone is injured or suffers a deformity or problem caused by an illness, disease, or birth defect, the plastic surgeon can repair it.