Do any surgeons accept Amerigroup? Would I need a referral or are there any programs that help low income women like me? (Photo)

Best for you to contact AmeriGroup insurance for a Plastic Surgery referral. I hope they have one for you. Otherwise it is an out of pocket expense for you. You could see if there is a Plastic Surgery Residency in Las Vegas so obtain discounted resident care/surgery... 

I am sorry to hear about the physical and psychosocial problems to your disproportionately large breasts are causing you. Based on your description and photographs you may be an excellent candidate for breast reduction surgery.  
The best way to obtain insurance coverage for breast reduction surgery involves some “hoops” to jump through. The more documentation you have (for example, from your primary care doctor, physical therapist, chiropractor etc.) the better when it comes to obtaining insurance “authorization” for the procedure.
This documentation and letter/pictures from your plastic surgeon will help you obtain authorization. Make sure you are  consulting with a well-trained/experienced board-certified plastic surgeons.
 When dealing with health insurance companies, be prepared to be persistent. Keep in mind, that breast reduction surgery tends to be one of the most patient pleasing operations performed.
I would also suggest that you communicate your goals clearly with your plastic surgeon and make sure that you have realistic expectations prior to proceeding with any type of surgery. In regards to breast size desired, also communicate carefully. In my practice the use of goal pictures are helpful in this regard; a discussion of cup size can be confusing and imprecise.   Therefore, I would not suggest that you communicate your goals and/or base your satisfaction with the outcome of surgery on achieving a specific cup size.
 I also find that the use of pictures is more helpful than the words “natural” or "proportionate” etc., which can mean different things to different people.
Many of my patients choose to have enough breast tissue removed to help alleviate symptoms while retaining enough breast tissue to remain proportionate to the remainder of  bare torso. Again, preoperative communication will be critical.I hope this, and the attached link, helps.

Breast reduction may or may not be covered depending on your insurance carrier and your breast size. Please check your insurance policy to see whether breast reduction is a covered procedure. Often times, insurance company will dictate how much breast tissue to be removed. Please visit an experiences, board-certified plastic surgeon to learn about the procedure, its cons and pros, benefits, and alternatives. Please contact your insurance carrier to learn about inclusion and exclusion criteria. Best wishes.