What is OAS CAHPS?
The Consumer Assessment of Healthcare Providers and Systems Outpatient and
Ambulatory Surgery (OAS CAHPS) survey is a patient experience of care
survey for Medicare-certified hospital outpatient departments (HOPDs) and
ambulatory surgery centers (ASCs).
How was the survey developed?
The survey development process followed the principles and guidelines
outlined by the Agency for Healthcare Research and Quality (AHRQ) and its
Consumer Assessment of Health Providers and Systems (CAHPS®
) Consortium in developing a patient experience of care survey. This
included reviewing surveys submitted as a result of a public call for
measures; reviewing existing literature; conducting focus groups with
patients who had recent outpatient surgery or procedures; conducting
cognitive interviews with patients to test their understanding and ability
to answer the questions; obtaining stakeholder input on the draft survey
and other issues that may impact survey implementation; and conducting a
field test in 2014. The goal of the survey development process was to
identify and include dimensions of care that patients and other consumers
want or need to inform their choice of an HOPD or ASC. In 2015, CMS
conducted a mode experiment to assess the effects of using three data
collection modes of administration and to determine whether ratings of
outpatient/ambulatory care vary by patient characteristics.
What are the survey topics?
The survey measures patients' experiences on topics that are important when
choosing an HOPD or ASC. The questions relate to facilities and staff,
communication about the procedure and preparing for discharge and recovery.
What is the current status of the survey?
Voluntary national reporting program began in January 2016 and will
continue until noted in future rulemaking. The current OAS CAHPS survey
protocol allows for three administration modes: mail only, telephone only
and mail with telephone follow up.
What is the mode experiment?
The Web mode experiment will be conducted by RTI International to
investigate the feasibility of adding Web-based data collection.
The mode experiment will test mail- only, telephone- only, web- only, web
with mail follow-up, and web with telephone follow-up modes of data
collection. A representative sample of HOPDs and ASCs will be selected and
recruited. The recruitment effort begins in January 2019; data collection
is projected to begin in the Spring of 2019.
What are the benefits to participating in the mode experiment?
Participation provides an opportunity to understand patients'
experiences at HOPDs and ASCs.
Survey findings will identify areas for improvement for participating
CMS will cover the costs of implementing the Web mode experiment; RTI
will prepare and mail the questionnaires, prepare and send the Web survey
and conduct the telephone interviews as well as prepare summary results.
At the conclusion of the study, overall de-identified frequencies of
survey responses will be shared with all participating HOPDs and ASCs;
aggregate results will be sent to each participating HOPD or ASC
What is needed from HOPDs and ASCS for the mode experiment?
Over a period of three consecutive sample months starting Spring 2019,
participating HOPDs and ASCs will provide a list of patients who had an
outpatient surgery or procedure in the prior month. Patients selected from
each of the three months will receive either a mail, telephone, web, or a
mixed mode survey. Each data collection period, regardless of mode, will
last approximately six weeks. Patients will be randomly assigned to one of
the five data collection modes. The survey will be available in English and
What patient information is needed from participating HOPDs and ASCs?
The following is a list of patient information needed:
Date of birth
Date the surgery or procedure was performed
Level I CPT Surgery Codes (10021-69990) or the following G-codes
(G0104, G0105, G0121, G0260)
Patients who have been sampled for another survey administered for the
facility should be excluded from the mode experiment. RTI will work with
HOPDs and ASCs or their designated vendors to facilitate this process.
What data security measures are in place?
RTI has policies, procedures, systems, and processes in place to ensure
that personally identifiable information (PII) and private health
information (PHI) are protected and secured at all times. We are happy to
provide a letter from RTI's Privacy Officer addressing more specifically
how RTI protects PII and PHI.
Are HOPDs and ASCs required by federal law to participate in the Web
No. Participation is voluntary. However, we hope all selected HOPDs and
ASCs will participate in this study so that the general population of
providers that perform outpatient surgeries and procedures is accurately
and fairly represented.
What if I have additional questions about OAS CAHPS or the mode
We welcome questions and comments via our email address at firstname.lastname@example.org or our toll-
free number 1-866-590-7468 (please leave a message).