Additional detail from a post on other page than single.php

You could add a query string to the more link. For example, you have made a custom Page template and published a Page (detail-page) with this custom Page template. Now you can link to this Page from your single.php (example.com/detail-page). Add a query string with the post ID (example.com/detail-page?detail-post=23). In your custom page template you could do something like this [untested]:

if(isset($_GET['detail-post']) && $_GET['detail-post']){
  if($telephone = get_post_meta($_GET['detail-post'], 'telephone', true)) {
  echo 'telephone: '. telephone;
  }
  if($address = get_post_meta($_GET['detail-post'], 'address', true)) {
  echo 'address: '. $address;
  }
} else {
echo 'there are no details';
}

Is this a custom post type or is “jon-doe” a child page of the “person” Page?

I think in this case “alaxender-desouza” is a (child) category in stead of a post?
http://staging.bestofbentonville.com/business-directories/bentonville-doctors/alaxender-desouza/

can you please put the body class in your theme, so we know what template file we’re looking at.

Ah, I see. You probably have to add your own rewrite rules to WordPress to have it rewrite to /postname-detail. I assume your permalink structure is /%category%/%postname%/.

download a rewrite class from here: http://www.refactord.com/adding-rewrite-rules-to-wordpress
Put it in your functions.php (without the opening <?php tag) and add this under it:

$options = array(
  'rules' => array(
             '(.+?)/([^/]+)\-(detail)(/[0-9]+)?/?$' => 'index.php?category_name=$matches[1]&name=$matches[2]&detail=$matches[3]&page=$matches[4]'),
  'query_vars' => array('detail')
);  

$add_rewrite_rules = new Refactord_add_rewrite_rules($options);

resave your permalink structure under Appearance > Permalinks.

Now check in your browser if you put “-detail” after a single post title in the address bar if you still get the post.

If it works you can do something like this in single.php:

$detailpage = get_query_var('detail');
if($detailpage == 'detail' ) {
	echo "show details here";
} else {
echo "show normal single page here";
}