You can choose any qualified health care professional, whether medical, osteopath, or chiropractor, to treat your injuries.  The choice of medical provider is a personal choice, and no one can tell you which doctor you must see for treatment of your injuries. 

If you have health and accident insurance (other than your automobile insurance policy), you should not submit bills relating to your accident to your health insurer.   This only complicates your situation.  The no-fault insurer (that's usually your own automobile insurance company) must pay the medical bills relating to your accident.

If you have suffered a serious injury, one that will likely be permanent,  it is also a good idea to find and retain a competent lawyer soon after the accident.  Be sure to choose a lawyer who specializes in representing injury victims.  Most lawyers work on a contingent fee basis, and the fee will be the same whether you retain the lawyer immediately after the accident or wait months or years to retain the lawyer.  It makes sense to find a lawyer right away in a serious injury case because there is always the possibility that witnesses will move away, die or otherwise become unavailable later.  Physical evidence, too, may be spoiled or lost.   Hiring a lawyer early reduces the risk that your case will be damaged before it is properly investigated.