Your primary physician will not be able to provide information about breast reduction surgery, although s/he will need to complete a pre-operative physical examination. Insurance prior-authorization is something your chosen plastic surgeon would do, and in addition to the subjective criteria of back and neck pain, shoulder grooving from bra straps, inframammary intertrigo (rashes), and sometimes brachial plexus compression form bra straps on the nerves in your shoulders, objective criteria (height and weight--BMI) are used to determine the exact minimum of breast tissue that must be removed per beast in order to qualify for reimbursement. What this means is that the larger you are for a given height, the more breast tissue that must be removed, with minimums of 400g per breast (usually). This is a minimum of nearly a pound of tissue per breast, and more if you are overweight. Pains and posture are insufficient for coverage, since every woman with large breasts can claim some degree of pain and posture problem, and every insurer can claim that if you lost weight, your breasts would reduce and you symptoms would diminish as well. So you see the problem here.You should start with a plastic surgeon who is ABPS-certified, a member of ASAPS, and with lots of breast experience. S/he will know the formula, and can show you a breast implant whose volume is the calculated amount that must be removed per breast. Then, you can determine if what remains is satisfactory for your body proportions. You always have the option to pay cash and then have full freedom to have your chosen surgeon remove only skin (breast lift), a small amount of breast skin and tissue ("cosmetic reduction"), or anything of your choosing, since insurance mandates are not in play.But if you want insurance to cover surgery, then you must follow their subjective AND objective criteria. Start with plastic surgical consultations. Best wishes! Dr. Tholen