Internal medicine is the branch of medicine that deals with treating the whole patient. An internal medicine physician, also called an internist, can treat many illnesses and conditions, and is skilled in treating a patient who has several illnesses or disorders at the same time. This internist, who can be a primary care physician, emphasizes disease prevention and wellness, but can treat problems of the eyes, ears, skin, nervous system and reproductive organs, along with mental health or substance abuse issues.

The internal medicine physician can also treat cancer or diseases of the heart, blood, kidneys, joints, and digestive, respiratory and vascular systems, while concentrating on the wellness of the patient as a whole.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are Emphysema, Broncho-Esophagology, Bronchitis, Pneumonia, Osteoarthritis , Hyper / Hypoglycemia, cystic fibrosis, Diabetes, Asthma, pectus excavatum, osteoporosis, Macular Degeneration, cancer, infection, Autism, Congestive heart failure, Herpes, Hypertension, Heart Attack, and Anemia.

Once properly diagnosed, practitioners can perform numerous procedures on patients including Lithotripsy, Endoscopic retrograde cholangiopancreatography (ERCP, dialysis, angioplasty, mechanical ventilation, endoscopy, cardioversion, Endoscopic retrograde cholangiopancreatography (ERCP), cardiac ablation, and intra-aortic balloon pump.

To diagnose patients with possible illnesses and diseases, specialists will often perform one of many tests including FAA-Flight Physicial, physicial / check up, Bone density test, dialysis, physicial examination, Computed Axial Tomography (CT or CAT Scan), Magnetic Resonance Imaging (MRI), ultrasound, x-ray, biopsy, Blood Test, Electrocardiogram (ECG or EKG), Upper GI (Barium Swallow), electrolyte test, Lower GI (Barium Enema), stool test, pH probe test, and microbiological culture.

Doctor density varies by specialty and location. Illinois has 6,372 practicing internal medicine doctors. Broken out by city, internal medicine doctor density in La Grange is 18, in La Grange Highlands is 6, in La Grange Park is 11, in La Harpe is 1, in La Salle is 2, in Ladd is 1, in Lake Bluff is 11, in Lake Forest is 38, in Lake In The Hills is 4, in Lake Villa is 4, in Lake Zurich is 21, in Lansing is 3, in Lawrenceville is 1, in Le Roy is 3, in Lemont is 16, in Lena is 2, in Lewistown is 2, in Lexington is 2, in Libertyville is 40, in Lincoln is 5, in Lincolnshire is 5, in Lincolnwood is 23, in Lindenhurst is 2, in Lisle is 8, in Litchfield is 2, in Livingston is 1, in Lockport is 3, in Lombard is 51, in Long Grove is 13, and in Loves Park is 7.

Most people think that Chicago, because of its size and popularity, is Illinois’ capital city, but that distinction belongs to Springfield, home of the Abraham Lincoln Museum. Illinois has hundreds of museums, numerous yearly art and ethnic festivals, a lakeshore bordering Lake Michigan, and the many national forests and parks that offers visitors camping, horseback riding, biking, kayaking, and fishing. Chicago is home to the Sears Tower, the Shedd Aquarium, the Art Institute of Chicago, the Adler Planetarium, the Museum of Science and Industry, and other cultural opportunities and restaurants in the Navy Pier area.

According to 2005 Census estimates, Illinois has a population of 12,763,371. Of this population, 3,172,677 are under the age of 18 and 1,523,937 are at or above the age of 65.