Which of the following best describes the process of external referrals?

The process of external referrals is best described by the option indicating that providers outside the system request appointments through third-party communications. This highlights the typical workflow where a primary care provider, when needing to refer a patient to a specialist who operates outside their healthcare system, will communicate with that specialist or their office. Often, this involves sending referral information through secure channels, coordinating via phone or electronic systems, and ensuring that all necessary patient data is shared efficiently to facilitate the appointment.

The correct option emphasizes the role of external providers in the referral process. It reflects the importance of communication between different healthcare entities and illustrates how appointments are coordinated beyond internal systems. This makes it distinct from the actions of patients or insurance companies, who may have different roles in the healthcare process.