Really sounds like that needs to be changed then. As long as healthcare isn't socialized, you shouldn't have to be stuck with an ambulance bill for a broken foot because some outdated regulation says you can't be given an Uber instead.
State law regulates drivers, medical transport is a subsection and medical transport is further broken down into emergency transportation and non-emergency transportation. What the law says is you can’t just start offering medical transportation services to the public in exchange for money without complying with the law/regulations.
Further, as you might imagine doctors are regulated, and if you are treating a patient who needs to be transported to an ER for emergency services, the doctor should understand a Lyft/Uber isn’t the appropriate standard of care and is per se illegal under those facts. The doctor may have had his/her heart in the right place be not calling an abmbulance to reserve that for a hypothetical life/death patient, but it’s hard to argue this isn’t an emergency when your a doctor sending your patient to the ER, at which point emergency medical transportation laws/regulations apply.
My wife drive me by nothing stopped me from using a taxi or ride share.
Doctors definitely have a duty of care that must consider emergency transport, but it's be surprised if laws explicitly stated you need to call an ambulance for stable patients that need emergency treatment.
However, the medical practitioner themselves cannot tell you to take an Uber to the hospital. Which is sensible.
I gp is rarely going to be in a situation where they need to call an ambulance for a patient; generally it's going to be the organization (like a nursing home) or management/administrator to avoid potential liability