Note: please put this code in functions.php of your current theme.

function custom_wpcsr_including_insurance_label_callback(){
  // Change the "Including Insurance" label
  $label = 'Change Including Insurance Label here';
  return $label;
}
add_filter( 'wpcsr_including_insurance_label', 'custom_wpcsr_including_insurance_label_callback' );

function custom_wpcsr_without_insurance_label_callback(){
  // Change the "Without Insurance" label
  $label = 'Change Without Insurance Label here';
  return $label;
}
add_filter( 'wpcsr_without_insurance_label', 'custom_wpcsr_without_insurance_label_callback' );