I work for the area of HP that handles the Medicare Part B system. I have been working with the Medicare Part B system since the late 80s for a succession of companies (Travelers, Primerica, The Travelers Companies, MetroHealth, United HeathCare, United Heath Group, Uniprise, Electronic Data Systems (EDS), and currently HP. I have worked in several areas of Medicare. From early 2009 until early 2011 I worked in a project to transition the Medicare carriers to HIGLAS (a General Ledger Accounting System). Starting in 2011, I moved to the MAC transition where Medicare Part B systems are being consolidated into fewer, larger data centers. This involves splitting and merging systems and being sure that there isn't any duplication in key identification fields like provider numbers and control numbers. The MCS system is written in Cobol and still has parts that are Assembler Language Code. Amazing but true.