I know this is an old question and the OP may not still be looking for help, but someone may have the same question.
Using the above code to work from:
global $post;
$posts = get_field('doctors');
if ($posts) {
foreach ($posts as $post) {
setup_postdata($post);
$name = get_field('doctor_name');
if ($name) {
$field_object = get_field_object('doctor_name');
echo $field_object[label],': ',$name;
}
} // end foreach
wp_reset_postdata();
} // end if posts
