G9881 HCPCS - THE MDPP BENEFICIARY ACHIEVED AT LEAST 9% WEIGHT LOSS (WL) FROM HIS/HER BASELINE WEIGHT IN MONTHS 1-24 UNDER THE MDPP EXPANDED MODEL (EM). THIS IS A ONE-TIME PAYMENT AVAILABLE WHEN A BENEFICIARY FIRST ACHIEVES AT LEAST 9% WEIGHT LOSS FROM BASELINE AS MEASURED BY AN IN-PERSON WEIGHT MEASUREMENT AT A CORE SESSION, CORE MAINTENANCE SESSION, OR ONGOING MAINTENANCE SESSION