Outpatient and Ambulatory Surgery CAHPS (OAS CAHPS)

The Outpatient and Ambulatory Surgery Patient Experience of Care Survey (OAS CAHPS) will collect information about patients’ experiences of care in hospital outpatient surgery departments (HOPDs) and ambulatory surgery centers (ASCs).

In January 2016, CMS began voluntary monthly data collection using the OAS CAHPS tool. CMS will begin publicly reporting the data collected from July 1, 2016 through June 30, 2017 on a Compare website. However, facilities will have the opportunity to suppress their data from public reporting during the preview report period in 2017. CMS has proposed mandatory OAS CAHPS participation in January 2018.

Based on other CAHPS programs, Press Ganey knows that clients who start measuring early outperform those clients who wait until data collection is mandatory. Press Ganey encourages beginning with voluntary OAS CAHPS implementation as soon as possible to allow time to gain experience with the OAS CAHPS questions prior to mandatory participation.


The finalized OAS CAHPS survey contains 37 questions about the check-in process, facility environment, patient’s experience communicating with administrative staff (receptionists) and clinical providers (doctors and nurses), attention to comfort, pain control, provision of pre- and post- surgery care information, overall experience, and patient demographics. CMS has divided the survey into three domains for reporting; Care of Patients, Communications about Your Procedure, and Preparations for Discharge/Recovery. In addition, there are two global rating items; Overall Rating of the Facility and Likelihood of Recommending the Facility.

CMS conducted a one-time mode experiment of the 37 question survey tool and determined that a mode adjusted will not be applied to OAS CAHPS data before it is reported. However, there will be a patient mix adjustment applied to the OAS CAHPS data before it is reported, based on surgery type, overall health, overall mental health, age, education, and how well the patient speaks English.

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