Netgear Nighthawk AC1900 Cable Modem Router compatible?

I had thought I'd checked compatible devices on Xfinity's website before ordering a router of my own, but I am now not see it in the list of compatible devices even though it says on the box it is compatible with Xfinity.

Is Netgear Nighthawk AC1900 Wifi Cable Modem Router compatible with Xfinity internet?  I have 200 Mbps service.

If it is, how would I install and activate it with Xfinity so I can stop renting Xfinity modem $14 / month?  I wanted to have instructions and make sure it was compatible before I attempted and disrupted my service.