Final answer:
Upon enrolling in Medicare Part B, consumers have a six-month guaranteed-issue right to purchase a Medicare supplement insurance policy without medical underwriting or higher premiums due to health.
Step-by-step explanation:
When a consumer first enrolls in Medicare Part B at age 65 or older, they have a guaranteed-issue right to buy a Medicare supplement insurance policy for 6 months.
This period is known as the Medigap open enrollment period. During this timeframe, insurance companies cannot use medical underwriting to deny issuance of a Medigap policy or charge higher premiums due to past or present health conditions.