How easy is it for patients to use your web site? The link below is to a Mashable article that features online services that will set up a user review of your site for you. Click through to Usertesting .com and check it out including a sample video. This looks like a service dentists could use.
Usability testing already seemed simple enough: Find participants with specific demographics, have them perform specific tasks on your website, and note what they find confusing. But startups like UserTesting.com aim to make it even simpler by maintaining a pool of participants who will offer their user experience within about an hour of a request.