Chiropractors are not, repeat not, midlevel providers in any way, shape, or form. Physician Assistants, for example, who are midlevel providers receive legitimate medical training and know enough to both put together a differential diagnosis and (in theory) refer to a higher level of care for things about which they know little or nothing. Chiropractors are not only trained to a very low standard as befits the low standards required to matriculate into Chiropractic Schools (which are, themselves, largely federal student aid processing mills) but if they are trained in differential diagnosis, it includes mostly bogus pathology based on their thoroughly disproven and completely ridiculous understanding of medicine to which they apply their equally ridiculous principle treatment modality.
A chiropractor is singularly unqualified to provide Emergency Care, Primary Care, or any other kind of medical care you care to name. He would be no more useful at the scene of an accident than any other reasonably concerned citizen with basic common sense...except the idea that he is a real doctor may go to his head.