meta_value_num orderby expells posts with null custom field

So this is my problem. When I sort the posts with a meta_key price I get 442 posts as a result but once I comment ‘meta_key’ => ‘price’ I get 549 results. The others don’t show up because they don’t have the custom field price.

$args = array(
'posts_per_page' => -1,
'post_status' => 'publish',
'post_type' => 'medicament',
'orderby' => 'meta_value_num',
'meta_key' => 'price',
'order' => 'ASC',
'meta_query' => array(
        array(
            'key' => 'client',
            'value' => 239,
            'compare' => '=',
            'type' => 'NUMERIC'
        ),
),
);

$the_query = new WP_QUERY( $args );

Do you know a way to not exclude posts that do not have the custom field price and keep the sorting by price?

Thank you