Based on their information it doesn't look like they are using shared servers like most VPS providers. Being HIPPA compliant is no joke (and something I never want to be involved in ever again) and you cannot be HIPPA compliant if you're hosting other clients on the infrastructure so an exploit like this would have no impact on this unless of course they compromised a server on their network which can happen in any environment.
We are talking about VPS, Cloud, anything virtualized. Firehost is virtualized. How familiar are you with HIPAA and the requirements, because you can get compliance using a Cloud container such as the firehost or Amazon, or Microsoft, or Google. Plus the compliance is a mix of many things , from datacenter certification to ---------------------- office certification---------------------workstations compliance. Is a lot of things, (i worked in the field and had to assist some of my past clients).
But to end the blah, my intentions were not to derailed the thread, simply put, any platform using such virtualization technologies (not to forget the past emergency patches) could at some point leave the data to be compromised. Thought again, you are supposed to encrypt.