How many pharmacies' information can be accessed through the I-STOP program?

The I-STOP program, which stands for Internet System for Tracking Over-Prescribing, is designed to reduce prescription drug abuse and improve the monitoring of controlled substances. One of its key features is the ability for healthcare providers to access patient prescription histories from multiple pharmacies to ensure safe prescribing practices.

In the context of the I-STOP program, the correct choice indicates that healthcare providers can access information from up to 5,000 pharmacies. This capacity is crucial for monitoring prescriptions effectively, as it gives providers a comprehensive view of a patient's prescription history across a significant number of pharmacies. This integration helps to identify potential cases of prescription drug misuse or over-prescribing, contributing to better patient care and safety.

Other options would not align with the program's designed capacity and effectiveness in monitoring a broad network of pharmacies, which is essential for addressing the issues surrounding prescription drug abuse.