Addiction psychiatrists are medical doctors who specialize in the treatment of people who have addictions to substances such as alcohol

Adolescent medicine specialists are doctors (sometimes internists or pediatricians) who specialize in the diagnosis and treatment of conditions

Allergists (also called immunologists) are medical doctors who specialize in the diagnosis and treatment of immune system diseases

Anesthesiologists are medical doctors who specialize in the sedation of patients while in surgery.

Cardiac electrophysiologists are cardiology doctors (cardiologists) who have specialized training in the heart's electrical system

Cardiovascular surgeons are medical doctors who specialize in surgery of the heart and blood vessels.

A cardiologist is a doctor with special training and skill in finding, treating and preventing diseases of the heart and blood vessels.

Colon and rectal surgeons are medical doctors who specialize in surgery of the colon and rectum.

Critical care medicine specialists (also called intensivists) are medical doctors who specialize in the care of people who are in an intensive care unit (ICU).

Dermatologists are medical doctors who specialize in diagnosing and treating diseases and conditions of the skin, hair, or nails,

Developmental pediatricians are medical doctors who specialize in the diagnosis and treatment of children with behavior

Emergency medicine specialists, commonly called ER doctors, are medical doctors who specialize in emergency care.

Endocrinologists are medical doctors who specialize in the diagnosis and treatment of diseases of the endocrine glands

Reproductive endocrinologists are medical doctors who specialize in diagnosing and treating infertility and other reproductive or hormonal disorders.

Family medicine physicians, also called family practice physicians, are medical doctors who specialize in the total health care of the individual

Forensic pathologists are medical doctors who examine tissue samples and perform autopsies to find clues about the cause

Gastroenterologists are medical doctors who specialize in the diagnosis and treatment of diseases of the digestive system,

Geriatric medicine specialists (also called geriatricians) are generally family medicine doctors or internists

Gynecologic oncologists are medical doctors who specialize in the care and treatment of women who have cancers of the ovaries,

Gynecologists are medical doctors who diagnose and treat diseases of the female reproductive system.