Which of the following are reasons that medical practices would use skip tracing?

Skip tracing is primarily used by medical practices to locate patients who have not responded to communications, particularly when mail is returned as "Return to Sender." This situation often indicates that the patients have either moved or changed their address without notifying the practice. By employing skip tracing, practices can find updated contact information, which is crucial for continued follow-up on billing, appointment reminders, and communication regarding care.

This method helps ensure that the practice can efficiently manage its accounts receivable and maintain effective relationships with patients by keeping them informed and engaged. It does not directly impact agency fees, billing errors, or patient satisfaction scores in the way that locating missing patients does, making it the most relevant reason in the context of skip tracing.