You can make it possible for search engines to display complete contact information for you or your firm in search. Marking up contact info like phone numbers, URLs, emails and names makes it easier for search engines to display that information in search. It also makes it easier for users to contact you using less steps. Below is an example of contact information marked up with Microdata.
<div itemscope itemtype=”http://schema.org/Attorney”>
<span itemprop=”name”>John Lawyer</span>