public function getTypeCodes()
    {
        return array(
            'A' => $this->_('Ambulatory'),
            'E' => $this->_('Emergency'),
            'F' => $this->_('Field'),
            'H' => $this->_('Home'),
            'I' => $this->_('Inpatient'),
            'S' => $this->_('Short stay'),
            'V' => $this->_('Virtual'),
        );
    }