Effective September 1, 2015, pass-through billing will no longer be permitted by Blue Cross and Blue Shield of Alabama. Pass-through billing occurs when an ordering provider (i.e., physician or laboratory) requests and bills for laboratory tests, but the tests are not actually performed by the ordering provider. The performing provider should bill for these services directly. This requirement is applicable to all in network providers. The requirements for pass-through billing for labs may be applied to other services in the future.