If the Mankato Clinic owes you a refund due to an overpayment or credit balance, we will issue a refund after it has been verified by the Payment Analyst.  Provided there are no other balances owed to Mankato Clinic, Mankato Clinic Endoscopy Center or the Mankato Clinic Express, we will credit your credit card or send you a check, depending on how you made the initial payment. For any questions concerning a refund due, call your Mankato Clinic Patient Account Representative at 507-389-8507 or toll free at 800-657-6944.