Final answer:
An appointment book in a healthcare setting usually contains protected health information (PHI) and should be kept out of sight.
Step-by-step explanation:
The statement is true. An appointment book in a healthcare setting usually contains protected health information (PHI). PHI refers to any information about a person's health condition, treatment, or payment for healthcare that can be used to identify the individual. As per the Health Insurance Portability and Accountability Act (HIPAA), healthcare professionals and organizations are required to keep PHI secure and confidential.