As used in this subpart—

Entitled to Medicare on the basis of disability means entitled or deemed entitled on the basis of entitlement to social security disability benefits or railroad retirement disability benefits. (§406.12 of this chapter explains the requirements an individual must meet in order to be entitled or deemed to be entitled to Medicare on the basis of disability.)

Family member means a person who is enrolled in an LGHP based on another person's enrollment; for example, the enrollment of the named insured individual. Family members may include a spouse (including a divorced or common-law spouse), a natural, adopted, foster, or stepchild, a parent, or a sibling.