I like Entry #3. Very creative. I like the blue but would like to see a very slightly darker green. I like the crescent as a "D" but I'm a little worried that patients would have a tough time identifying it as a "D" because it looks like an "O". I like the font on the lettering, nice and clean.
#33 is a good changeup from the other designs I've seen. I like the change. If there is anyway to get a little green into the design it would be cool. Thanks