How To Insert Schema Markup In Posts Without Code Being Parsed

I’ve been trying to insert Schema markup in individual posts on the same website manually for local businesses but WordPress keeps removing the code when I update and replaces it with non code characters.

This is the code I’m trying to insert in individual posts:

<div itemscope itemtype=”http://schema.org/Dentist”&gt;
<span itemprop=”name”>Cleveland Dentist</span>
<div itemprop=”address” itemscope itemtype=”http://schema.org/PostalAddress”&gt;
<span itemprop=”streetAddress”></span>
<span itemprop=”addressLocality”>Cleveland</span>,
<span itemprop=”addressRegion”>OH</span>
<span itemprop=”postalCode”>44101</span>
</div>
Phone: <span itemprop=”telephone”>440-317-2687</span>
URL of Map
</div>

Do I need to use the tag for it to work or is it something else I need to add?

Any help appreciated.