The insurance company cannot force a change of doctors on you like this. You need to consult an attorney as soon as possible before the insurance company forces something on you they shouldn't. You should also apparently be receiving your benefits and the fact that you are not receiving them means there is a bigger problem than you realize with your claim. You need to consult a Virginia attorney right away.
I have practiced Virginia Workers Compensation law for 35 years. I agree with Mr. Sweeney that the insurance company cannot force you to switch treating doctors. However, the insurer can ask for a second opinion about your surgery. If the second doctor agrees that this surgery is necessary due to your accident, then you may not have a problem. You indicate the accident was 9 months ago but you have not yet received compensation. You also say there is a hearing in two weeks. This means your claim has not been "accepted" at this stage. You need to consult a WC lawyer immediately. See my website.
This response is meant to be information only and should not be considered to be legal advice. This information is not meant and should not be construed to be the formation of an attorney client relationship. I practice Virginia Workers compensation law and Social Security Disability law.