The Consumer Assessment of Healthcare Providers and Systems Outpatient and Ambulatory Surgery Survey, hereafter referred to as the "OAS CAHPS" survey, is designed to measure the experiences of care for patients who visited Medicare-certified hospital outpatient departments (HOPDs) or ambulatory surgery centers (ASCs) for a surgery or procedure. The survey is designed to:

  • Produce comparable data on the patient's perspective that allows objective and meaningful comparisons between HOPDs and free-standing ASCs on domains that are important to consumers.
  • Allow consumers to make more informed choices when choosing an HOPD or ASC.
  • Facilitate quality improvement initiatives for HOPDs and ASCs.

Specifically, the survey measures patients' experiences on topics that are important when choosing an outpatient/ambulatory surgery provider for their surgery or procedure. The following types of patient experiences are included:

  • communication and care provided by health care providers and office staff;
  • preparation for the surgery or procedure, and
  • preparations for discharge and recovery.

CMS is currently implementing the voluntary national reporting program. CMS will test additional modes of administration in 2019.