Final answer:
The correct entity that requires the use of ICD codes is the World Health Organization (WHO), which utilizes them for disease classification and health statistics.
Step-by-step explanation:
The ICD codes, standing for the International Classification of Diseases, are primarily used by the World Health Organization (WHO), which requires their use to classify diseases and help in the monitoring of morbidity and mortality statistics. Various entities in the healthcare field make use of ICD codes. For instance, clinicians use it to order lab tests and prescribe treatments, laboratories to identify necessary tests, health-care management systems to ensure treatment appropriateness, medical coders and billers for procedural coding and insurance claims, and epidemiologists for disease statistics.
HIPAA, or the Health Insurance Portability and Accountability Act, requires the confidentiality of patient records but does not directly mandate the use of ICD codes; it rather sets the standards for protecting patient information. As such, the correct answer for the use of ICD codes is the World Health Organization.