Not necessarily, but we highly recommend it. We recommend paying your invoices as soon as possible to avoid any late fees.
If the bill is very high, then you can speak with the doctor, hospital, etc. to request to go on a payment plan to pay the balance.
Following the submission of your claim in your Feather account (learn more about how to submit a claim here), any approved reimbursement will be made directly to you at your designated IBAN, not to the person that is billing you.