Improving the satisfaction of patient on the consultation and treatment service (CTS) partly reflects the improvement of CTS quality, which has been found to be prominent issues in the health sector. The study was to assess the impact of ISO 9001:2000 in the satisfaction of the patient to the CTS. The results showed that the significant difference (p 0.05) between two arms of the ISO applied hospitals and the non-ISO applied hospitals found in 6 out of the 14 evaluated indicators (achieving good and very good levels): the attitude of doctors (respectively 88.9 percent
84.6 percent)
doctor's explanation on the severe of the patient's illness (83.1 percent vs 77.9 percent)
attitude of doctor during consultation (85.4 percent vs 81.8 percent)
attitude of nurses during care giving (86,8 percent vs 75,1 percent)
the guidance of health staff in the reception unit (79.5 percent vs 75.1 percent) and the quality of inpatient ward infrastructure (71.8 percent vs 65.4 percent). In conclusion, ISO 9001:2000 has positive impacts to improve the satisfaction of patient on the CTS by improving the communication attitude of doctors, nurses, health staff on the patient and improvement of inpatient ward infrastructure's quality.