Note:  this applies to specific (mostly N. California) regions in California.  You likely received this notice if you are a NBS provider, but just in case you didn't:

Western Clinical Laboratories will NO LONGER be testing newborn screen specimens. The lab is closing and is not accepting any more newborn screens. ALL SPECIMENS must be shipped to Allied Laboratories in Mountain View. View attached notice for address of GSO shipping and address for United States Postal Services address. There are two different addresses depending upon which method of shipment you use. Please click the file below for more information.

midwifenoticelabs1.pdf