Final answer:
ICD codes are used to describe a patient's diagnosis for proper billing and reimbursement in medical settings.
Step-by-step explanation:
The types of codes used to describe a patient's diagnosis for proper billing and reimbursement are known as ICD codes (International Classification of Diseases codes). These codes are used by clinicians, medical laboratories, health-care management systems, medical coders, and medical billers. For example, when a patient seeks treatment for a viral infection, ICD codes are used by clinicians to order tests, by laboratories to identify which tests to perform, and by medical billers to process insurance reimbursement claims.