The determination as to whether you will be paid by paper check or electronic funds transfer (EFT) is not managed by PracticeAdmin or the clearinghouse. You will need to contact the payer directly inquire about payment methods and to enroll or dis-enroll from EFT.
Note that when there are changes to the bank account in which the EFT funds are deposited or the destination of your ERAs, you will need to update your information at the CAQH solutions site.