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.
Start Here Â». Mastic is a resin extracted from the trunk of the mastic tree. The mastic drips out of the mastic tree trunk as if the tree were crying â so the resin is called mastic tears. Although mastic starts as a liquid, it hardens to the yellowish crystals shown above.