Final answer:
ICD codes can be found in medical records and medical billing, and they play a crucial role in tracking and managing patient care as well as determining reimbursement amounts.
Step-by-step explanation:
Medical billing and medical records are the two places where you can find International Classification of Diseases (ICD) codes. ICD codes are used in medical records to document a patient's diagnosis and course of treatment. They facilitate the tracking and management of patient care by physicians and other healthcare professionals. ICD codes are used in medical billing to calculate how much insurance companies will pay for the services rendered. An ICD code is assigned to a patient, which makes it easier to process insurance claims and keeps track of patient data across healthcare systems.