A cardiac surgeon is a medical professional who is experienced and skilled in treating heart problems, disorders, diseases, and conditions. They can diagnose certain heart problems and treat them with surgery. They work closely with other medical professionals, such as primary care doctors and cardiologists. Cardiac surgeons often perform surgeries to correct heart problems and heart disease, but they can also work on other areas in the chest.

A general surgeon is a medical professional who performs surgery on patients. General surgeons typically perform common surgeries and have attended college and medical school to learn the skills needed to perform them successfully. They also care for their patients before and after operations and can give an accurate prognosis after the surgery is complete and the patient has had time to heal.

An internist or Internal Medicine doctor is someone who specializes in diagnosing and treating illnesses, diseases, and health problems. Most internists are also primary care doctors and treat patients on a regular basis. They can diagnose and treat common illnesses or more serious problems. Most people see an internist regularly. Those with chronic illnesses may do so on a monthly or even weekly basis. Internists are the most common types of doctors.