Diagnose presence and stage of diseases using laboratory techniques and patient specimens. They study the nature, cause, and development of diseases. They perform autopsies.

Diagnose, treat, and help prevent diseases and injuries of the eyes and related structures.

Diagnose and treat diseases using radioactive materials and techniques. They monitor radionuclide preparation, administration, and disposition.

Diagnose, treat, and help prevent diseases and disorders of the nervous system.

Provide inpatient care predominantly in settings such as medical wards, acute care units, intensive care units, rehabilitation centers, or emergency rooms. They manage and coordinate patient care throughout treatment.

Diagnose, treat, and help prevent diseases or other conditions of the skin.

Diagnose, treat, and help prevent allergic diseases and disease processes affecting the immune system.

Treat diseases, injuries, and deformities by invasive, minimally invasive, or non invasive surgical methods, such as using instruments, appliances, or by manual manipulation.

Diagnose, treat, and help prevent disorders of the mind.

Diagnose, treat, and help prevent children's diseases and injuries.