ComplyRight® Jumbo CMS-1500 Health Insurance Form Envelopes for 50 Forms, Square Flap, Self-Adhesive Closure, 9 x 12.5, White, 100/Pack (TFP742810) EachComplyRight Jumbo CMS 1500 Health Insurance Claim Form Envelopes help prevent processing delays by allowing the sender to load the envelopes without folding the related forms before mailing them. Each envelope features a security lining to help ensure your patients' private information remains confidential. Preprinted face, self sealing square flap and return address window provide additional processing convenience. Designed specifically for CMS 1500