CMS has released CY2016 national data, here. I've also put in the cloud, here. This is a zip file folder with many small files with sequential series of CPT codes and their national utilization and total national spend. A window into some CY2016 lab data appeared a few weeks ago in an OIG report. Now you can see all the CY2016 national lab data.
CMS has set up the webpage for state specific CY2016, but the links don't work yet. Here.
For completeness, eventually CY2016 provider specific data will appear here, but not til about June 2018. I've also summarized the data sources in one blog, here.
The molecular codes from 81162 to 81599 inclusively tally about $479M. For a breakdown, see my blog entry here.