So basically to become a cardiologist, you will need 4 years of undergraduate studies, then 4 years of medical school. You will then do a further 3 years residency program in internal medicine.You will then need to get a license from your state that enables you to practice medicine.You will then be required to do 3 years of residency where you concentrate on cardiology.ow much does a cardiologist make. In the United States, the median cardiologist salary is reported to be $375,000 per year. The figure for the lowest 10th percentile is $251,000 per year and for the highest 10th percentile, the figure is reported to be $550,000. The middle 50% earns from $310,000 to $466,000.