How does billing occur?
Billing depends on how you choose to manage your plan. The frequency of billing depends on your providers and the frequency of services you use.
If you are self-managed, invoices will be sent directly to you by your providers.
If you are plan-managed, your providers will send invoices to your nominated plan manager, who will pay them on your behalf.
If you are NDIA managed, invoices will be sent to the NDIA, who will pay them on your behalf.