Internists treat a wide range of conditions. Their patients are mostly adults.

Many internists are primary care physicians and often the first point of contact for people seeking health care. They see the same patients on a regular basis. When needed, they send patients to health care specialists for testing or treatment.

Internists treat common illnesses like infections and the flu. They also treat conditions and problems that affect internal organs, such as the:

• Stomach
• Kidneys
• Liver
• Digestive tract

Internists ask patients questions to learn about their medical history. They examine patients and, if necessary, order lab tests. Internists explain test results and review treatment options with patients and their families. If more than one treatment is available, they help patients decide which option to choose. Internists watch a patient's condition and make changes in the treatment plan if needed.

They talk to patients about good health practices, such as diet and exercise. They also talk to patients about managing their lifestyle, especially smoking cigarettes and drinking alcohol.

Internists share similar tasks with other types of physicians, they:

• Assign tasks to nurses and other health care workers
• Consult with other health care professionals
• Oversee the business aspects of running an office
• Keep detailed records about each patient
• Write reports for insurance companies and government agencies

Some internists teach at medical schools. They may also do research on procedures and treatments for disease.