Thanks for pointing that out(I learn something new every day). I looked into this and attestations are published here: https://dashboard.healthit.gov/datadashboard/documentation/e...

On a quick scan (the spreadsheet file was 300MB and it looks like I wasn't able to load everything on my computer at work), there are at least 300+ OEMR attestations (this is the non-profit organization that represents OpenEMR for MU certification).

Will plan to look into this further and thanks again for pointing this out.

It is Stage II certified (http://www.open-emr.org/wiki/index.php/OpenEMR_Certification... for details) and Stage III certification is a work in progress (http://www.open-emr.org/wiki/index.php/OpenEMR_Certification...).

I'll note that there are (possibly out of date) estimates at the bottom of the Stage III page of ~31 developer months of work to be fully ready for Stage III and an estimate of $22k to cover the cost of certification testing. I suspect the testing hasn't gotten cheaper in the past 2 years, and I don't know how much developer effort has gone into MUIII.