An individual covered under a Blue Cross Blue Shield plan is called a(n):

The correct term for an individual covered under a Blue Cross Blue Shield plan is "Subscriber." In health insurance terminology, the subscriber is the person who holds the insurance policy and is entitled to benefits under that policy. This individual usually pays the premiums and has the right to make decisions regarding the coverage and benefits.

In contrast, a policyholder is typically the entity or individual that legally owns the insurance policy, which can sometimes differ from the subscriber. Beneficiaries are individuals designated to receive benefits from an insurance policy in the event of the death or incapacity of the insured, which is not applicable to health insurance in this context. The term "insured" generally refers to anyone who is covered under an insurance policy, but it lacks the specificity of indicating who holds the policy itself. Therefore, subscriber accurately captures the role of the individual in the Blue Cross Blue Shield plan.