We are very pleased to have Quest Diagnostics participate in National Preferred Provider Network (NPPN). This expanded relationship is a huge benefit to our NPPN membership and supports our commitment to help reduce healthcare costs for all of our customers. Implementation was completed in January.  -   John Lettko     Quotes
We are very pleased to have Quest Diagnostics participate in National Preferred Provider Network (NPPN). This expanded relationship is a huge benefit to our NPPN membership and supports our commitment to help reduce healthcare costs for all of our customers. Implementation was completed in January. John Lettko