Oncologist - A physician who is specially-trained in the medical treatment of cancer.  

Radiation Oncologist - A physician who is specially-trained in the treatment of cancer with radiation therapy.

Anesthesiologist - A physician who is specially-trained to administer anesthetics or provide therapies and procedures to manage pain.

Gastroenterologist - A physician concerned with the treatment of diseases of the stomach and intestines and associated organs.

General Surgeon - A physician specially-trained to provide diagnosis and treatment of disease or repair of faults or injuries through surgical procedures such as excision, incision, manipulation, or reconstruction. 

Gynecologist - A physician specially-trained in the diagnosis and treatment of women's health and specifically that of women's reproductive organs.

Interventional Radiologists - A physician trained in radiology who specializes in performing invasive procedures for diagnosis or treatment of diseases and disorders.

Otolaryngologist (ENT) - A physician who is specially-trained in the diagnosis and treatment of diseases of the ear, nose and throat.

Plastic Surgeon - A type of surgeon that is specially-trained to repair damaged, scarred or malformed parts of the body to improve the function or appearance of the body part.

Pulmonologist - A physician who deals with the structure, function and diseases of the lungs.

Urologist - A physician who is specially-trained to diagnose, and treat diseases and disorders of the urinary tract in men and women, and the reproductive organs in men.