Final answer:
The diagnosis codes descriptive of the disease or condition presented by the patient can be found in the International Classification of Diseases (ICD). It is maintained and updated by the World Health Organization (WHO) and assigns alphanumeric codes to various diseases, including viral infections, for treatment and insurance reimbursement.
Step-by-step explanation:
The diagnosis codes that are descriptive of the disease or condition presented by the patient can be found in the International Classification of Diseases (ICD). The ICD is used by clinicians to classify diseases, monitor morbidity and mortality, and assign proper codes for procedures performed. It is maintained and updated by the World Health Organization (WHO). The ICD assigns an alphanumeric code to every type of disease, including viral infections, and is used in conjunction with other coding systems for treatment and insurance reimbursement.