IDC Codes are used for insurance billing. Now that the Dr's are putting everything on computers this code will follow you ie buying a gun your SS# put in a red flag comes up, they will not be able to purchase a weapon. Drugs you can't be able to drug seek, its all computerized no running to different Dr.'s for scripts. Insurance policies better not put false information. Certain professions you will not be able to work because of a IDC code. The good of this is if traveling, the Dr can pull your information up on the computer and be able to treat you. So there is bad and good. This may prevent another Columbine, Va Tech shooting
I think the many unnecessary tests and the padded fees can increase the bills you pay. Incorrect diagnosis can also have an effect on your billing. You should have control over your visits and sometimes avoid certain procedures such as your blood pressure being taken.