You can register for a free account with us by visiting Medscape.com, and clicking on the "New User: FREE Registration" link. Fill out the registration form, and click 'Submit' when you're done. If you've filled in all of the fields successfully, you'll be brought to a page where you can select your Email Newsletter preferences. If clicking 'Submit' does not bring you to that page, then scroll up to determine the error(s) and make corrections.
You can also access this from a mobile device browser in the same way, or by selecting "I Am New To Medscape" after you've downloaded one of our mobile applications.