Use these envelopes to mail unfolded CMS-1500 forms to insurance providers. Envelopes feature window die-cuts that match the standard CMS-1500 forms address location so no need for separate addressing or labeling. Exterior reads Please Do Not Bend, First Class Mail and Insurance Claim Forms Enclosed. Closing the envelopes is quick and easy. Simply peel the strip and seal. The Health Care Finance Administration has changed its name to Centers for Medicare and Medicaid Services. Since 1952, TOPS has provided quality products and services to businesses throughout the world. TOPS continues that commitment providing innovative, high quality value-added products for the office, school and home. Whether it's notebooks, writing pads, record books, time cards, business forms, or any of the hundreds of items we offer, you can count on TOPS products to help.