Our practice is new to allergy immunotherapy and I need some help with submitting the billing for CPT code 95165. The information I have found is a bit confusing. Specifically, how do I submit 95165 to blue cross blue shield? What is the difference between units and doses for the antigens? Since multiple doses of multiple antigens are in each vial, I am confused on how to calculate the units to be submitted. I also have no idea how much to charge for each unit. Any help is appreciated!