What action should a nurse take when encountering a chaplain inquiring about a patient?

Directing the chaplain to the visitor desk is the most appropriate action in this scenario because it adheres to the principles of patient privacy and confidentiality. Healthcare facilities have specific policies regarding who can access patient information and how visitors are managed. By directing the chaplain to the visitor desk, the nurse ensures that the chaplain can check in properly and receive any necessary authorizations to visit the patient, maintaining the confidentiality of the patient's health information.

This approach respects the patient's rights and the legal and ethical standards that healthcare providers must follow when sharing information about patients, ensuring that all visitors are appropriately vetted and informed about hospital protocols.