AHRQ - Consumer Assessment of Healthcare Providers and Systems

The Consumer Assessment of Healthcare Providers and Systems (CAHPS) program develops and supports the use of a comprehensive and evolving family of standardized surveys that ask consumers and patients to report on and evaluate their experiences with health care.
CAHPS originally stood for the Consumer Assessment of Health Plans Study, but as the products have evolved beyond health plans, the name has evolved as well to capture the full range of survey products and tools.
The CAHPS program is funded and administered by the U.S. Agency for Healthcare Research and Quality (AHRQ), which works closely with a consortium of public and private organizations.

http://www.cahps.ahrq.gov/