BlueCross BlueShield (BCBS) participating providers, also known as PAR providers, are health care providers who have signed a contract with BCBS to provide services to BCBS members. This means that they agree to accept the reimbursement rates and terms specified in the contract with BCBS, and BCBS members will typically pay less out-of-pocket for services received from PAR providers. Non-PAR providers, on the other hand, have not signed a contract with BCBS and may not be required to accept the same reimbursement rates and terms. As a result, BCBS members may have to pay more out-of-pocket for services received from non-PAR providers. It is important for BCBS members to check with their insurance plan to determine which providers are PAR and which are non-PAR, as this can affect their out-of-pocket costs for services received.