noun
payer
PAY-er/ˈpeɪər/
A person or organization that pays money owed.
The payer hands cash to the cashier at the grocery store.

Etymology
Old French paiere named the person doing the paying. The underlying verb developed from “pacify” or “satisfy” to satisfying a creditor, so a payer is the party providing what is owed.
In context
in order to receive shared savings someone has to submit data to the payer Medicare or Medicaid
More examples
- The insurance company is the main payer of these medical bills.
- Please enter the payer's name on the payment form.
- Late payers may have to pay an extra fee.
Forms
payer · payers
pay verb — Give money to settle an amount owed.
payee noun — A person or organization receiving payment.