Final answer:
The codes for catheterization of the coronary arteries would be found in the Cardiovascular System section in medicine.
Step-by-step explanation:
If catheterization is performed on the coronary arteries, the codes would be found in the Cardiovascular System section. The cardiovascular system is responsible for the circulation of blood throughout the body, including the coronary arteries that supply blood to the heart. Procedures such as catheterization of the coronary arteries would be specifically classified under the cardiovascular system codes.