1 â¢ Print, sign and date the two-page Certification. Statement and mail it along with all requested. supporting documentation to the Medicare. contractor. 2  Note: 3  Do not mail the CMS-855 paper that can. be printed from Internet-based PECOS.  Retain this information for your records.
Definition of mastic. 1 : an aromatic resinous exudate from mastic trees used chiefly in varnishes.
Chios Mastic Mastiha (Greek: Î¼Î±ÏÏÎ¯ÏÎ±) is a resin obtained from the mastic tree (Pistacia lentiscus). In pharmacies and nature shops, it is called Arabic gum (not to be confused with gum arabic) and  Yemen gum .he rarity of mastic and the difficulty of its production make it expensive. As a result, imitations in the form of other resins appear in the market, sold as mastic, such as Boswellia or gum arabic. Other trees, such as Pistacia palaestina, can also produce a resin similar to mastic.