Hi
This is a common question. The short story is the certification criteria changed for 2015 and we partnered with a couple companies (Updox and UNIS) to certify. This was not needed for 2014 certification, so we were able to certify by ourselves.
So to get a 2015 certification, you have to add Updox and UNIS in order to get the certification number. (Updox is used for direct messaging, and UNIS is used for eCQMs).
Or, if you want to make it easy on yourself, you can find the certification numbers on our website. We post them publicly there. Here is the link:
https://amazingcharts.com/meaningful-use/. Just click on the version you need and the certification number will be there.
I hope this helps.