Ambulance services are nonemergency and emergency patient transports. These services include out-of-hospital acute medical care, transport to definitive care, and other medical transport to patients with illnesses and injuries which prevent the patients from transporting themselves.

References

https://pfd.hhs.texas.gov/acute-care/ambulance-services
https://medicaid.ncdhhs.gov/providers/programs-and-services/medical/ambulance-services