Yes, your data warehouse does need to be certified. However, only those capabilities that your data warehouse is intended to perform and for which certification is required would need to be tested and certified. Other capabilities that the data warehouse may also perform (e.g., benchmarking, research analytics) would not need to be tested and certified. Thus, if you plan to use a data warehouse to calculate and submit clinical quality measures to CMS or States for meaningful use, the data warehouse would be performing a capability for which the Secretary has adopted a certification criterion and for which you as an eligible health care provider have a correlated meaningful use requirement to satisfy.