Often non-emergency medical transport is significantly less expensive than transport due to a medical emergency. During non-emergency transport, the medical personnel are not actively engaged in life saving activity. This results in a safer ride for all involved as they are not rushing towards a hospital. Since the transport is generally scheduled in advance, and can be set to take place during regular daytime business hours, it is often billed at a lower rate.
That being said, it is still important to understand the potential costs involved. Many types of health insurance offer coverage regarding non-emergency medical transport. It is important to take the time to understand any benefits that you may be using as the conditions for approved use may be very specific.