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.
Mastic gum is a resinous extract from the Pistacia lentiscus tree, indigenous to the Mediterranean islands.Historically, mastic gum has had many commercial uses, dating as far back as the Greek Empire where it was used as a form of chewing gum.It traditionally has been used as a treatment for dyspepsia and other disorders of the digestive tract.istorically, mastic gum has had many commercial uses, dating as far back as the Greek Empire where it was used as a form of chewing gum. It traditionally has been used as a treatment for dyspepsia and other disorders of the digestive tract.