Abstract:Background: Patients' satisfaction has become an important tool to assess the quality health care services, which is progressively required by accreditation agencies in the checking of quality of hospital care. Aim: evaluate oncology patient satisfaction towards health care services at University Hospital after accreditation. Methods: Quantitative, descriptive study was used. This study was conducted in five units as the medical; surgical (male and female) and gynecology wards at King Abdulaziz University Hospital. It is one of the first Hospitals in the eastern Mediterranean region implement health care accreditation standards. Sample: Total number of non-randomized convenience sample was 123 oncology patients who admitted to the above-mentioned setting. Patients were selected for their oncology diagnosis from each department and who is oriented and conscious included in the study. Data was collected by structured interview questionnaire for measuring patient satisfaction level towards health care services. Results: Studied sample was satisfied by the knowledge and an experience they give about illness; information about medical tests; and information is given about treatment at (mean = 4.67); highly statistically, significant difference's relationship was observed in the total level of patient's satisfaction, and care received from nurses to the oncology patient during his hospital staying and regarding to services care organization at p = .000. Conclusion: there was satisfaction with the information provided by the medical staff about the patient's illness and the course of treatment. This is followed by the time spent with the physician and the interpersonal skills of the physician and nurses. The implication of study: develop the training program for health care providers about effective documentation; guidelines for providers in care for similar patients, and different formal monitoring systems are used by health care providers or regulators.