The Health Care Authority (HCA), Washington's single state Medicaid agency responsible for administering Title XIX & Title XXI of the Social Security Act and state-funded Apple Health programs (AH), is initiating this Request for Proposals (RFP) to solicit proposals from firms interested in providing the services of a Recovery Audit Contractor (RAC), with experience and expertise to audit payments made to AH providers and identify Improper Payments (including overpayments and underpayments).