I have MS. For years I was on a biologic drug with a high copay. Before I went on Medicare the pharmaceutical company that made the drug covered my copay so I paid nothing. Once you get on Medicare pharmaceutical companies are prohibited from covering the copay. The National MS Society helped me apply for a grant from a philanthropic organization to cover my copay. Maybe the National Diabetes Association can help you find a grant. I really hope you can find some way to obtain this much needed support in your efforts to stay well.