If it is blooming now in that picture then, yes, it is probably a paniculata. Dogwoods bloom in early-to-mid Spring. Kousa is a dogwood.

Yup, it's H. paniculata. Which cultivar (and as Luis said, there isn't a Kousa hydrangea) needs a larger photo of the whole plant in full bloom along with some closeups. Where you are is important as well since where you are influences season of bloom.

If you want to add that to your profile so it posts by your name when you post, here's how:

Go to Your Houzz in the upper right of every page, click Edit Profile, and on the left side click advanced settings. Well down the advanced settings page is a blank labeled Climate Zone for Garden Forums along with a link to find your zone.

If you add info on your state or the nearest large city you will get even better information since zone only relates to average coldest winter temperatures.

Then return to the top of the page and click Done Editing.