A psychiatrist has a medical degree in psychiatry. She may diagnose mental health issues, provide counseling services and prescribe medications.
An oncologist is a medical specialist who treats patients with cancer. He will help determine what type of treatment is best for a particular patient, such as chemotherapy vs. radiation therapy. He will also be available to help with medication for pain management from cancer treatments.
Ophthalmologists are medical doctors who diagnose and treat eye diseases and abnormalities. They can also perform eye surgery and prescribe medications.
The study, diagnosis and treatment of urinary tract disorders in both men and women is provided by a urologist. Your urologist may also diagnose and treat bladder and prostate problems.
An allergist studies your body's reaction to substances such as pollens, foods, animals and chemicals. She can offer treatments for asthma, hives and other allergic reactions you may experience.
In general, there are two groups of physicians: primary care and specialists. You can arrange an office visit with your primary care physician without a referral. The doctors in this group include pediatricians, gynecologists, as well as family medicine physicians and general internal medicine physicians. Specialists focus on specific illnesses and/or methodologies.