Advantage (MA) plans. Members of Humana plans that offer OSBs may enroll in OSBs throughout the year. Benefits 
may change on January 1each year. Enrollees must use network providers for specific OSBs when stated in the 
Evidence of Coverage (EOC); otherwise, covered services may be received from non-network providers at ahigher 
cost. Enrollees must continue to pay the Medicare Part Bpremium, their Humana plan premium and the OSB 
premium. Optional  Supplemental Benefits