Final answer:
The late enrollment penalty is added to the customer's Medicare Part B premium.
Step-by-step explanation:
When a customer accrues a late penalty for not accepting Medicare before the 63-day limit, the late enrollment penalty is added to the customer's Medicare Part B premium. Medicare Part B is the part of Medicare that covers outpatient services, doctor visits, and medical supplies. The late enrollment penalty increases the monthly premium the customer pays for Medicare Part B.