With a name like Medko Health, you may quickly run into problems with Medco Health Solutions (a division of Express Scripts) that has very deep pockets to challenge you on trademark issues. You might want to rethink the name.
It might be a good idea if the website used images of actual doctors in the system, rather than using generic clipart. For example, it took less than a minute to find one of the main images on the American Heart Association website:<p><a href="http://blog.heart.org/affordable-care-act-promises-patient-protections-for-young-family-members/boy-and-doctor-small/" rel="nofollow">http://blog.heart.org/affordable-care-act-promises-patient-p...</a>
I think you'd also have to add the Portuguese language to the menu, since Brazil is a potentially large market.<p>Also, as someone mentioned previously in the comments, adding images of actual doctors would be a very good idea, as it increases credibility.
Shameless plug for a company here in Houston doing the same thing in the US:<p><a href="https://2nd.md/" rel="nofollow">https://2nd.md/</a>