I recently developed a web portal for doctors and patients http://www.medi4.com Still looking ways to improve it .
I disagree somewhat with the posts above. The site looks clean, but a lot of generic stock photography is being used, and the site in general looks very salesy. Consider the audience you're targeting, they are looking for something trustworhty and safe. Design for that purpose and you may be on your way to gain some authority
If this info is being pulled from something like the yellow pages, I don't see much of a unique selling point? If it's the only place you can get this info, then you're definitely on to something.
The combination of colours is good and very easy to search but you have to increase your doctors database