G9873 HCPCS - FIRST MEDICARE DIABETES PREVENTION PROGRAM (MDPP) CORE SESSION WAS ATTENDED BY AN MDPP BENEFICIARY UNDER THE MDPP EXPANDED MODEL (EM). A CORE SESSION IS AN MDPP SERVICE THAT: (1) IS FURNISHED BY AN MDPP SUPPLIER DURING MONTHS 1 THROUGH 6 OF THE MDPP SERVICES PERIOD; (2) IS APPROXIMATELY 1 HOUR IN LENGTH; AND (3) ADHERES TO A CDC-APPROVED DPP CURRICULUM FOR CORE SESSIONS