First 3 pints of blood each year.
Plan offers discounted rates to certain members joining when initially eligible.
Plan adds surcharge for enrollment after initial eligibility period. Times You Can Buy A Medigap Policy 1. Persons who are Initially Eligible For Coverage can buy any Medigap policy available for sale in Massachusetts anytime during their special 6-month enrollment period which starts when the event occurred. During the Annual Open Enrollment Period of February and March , any Medicare beneficiary may buy a Medigap policy. Some individuals who have been enrolled in a Medicare HMO for less than 12 months may have a special right to buy certain Medigap policies.