This term got 4 hits on 05.11.2011, and is thus unlikely to be in active use
Medical » British Medicine
Commissioning for Quality and Innovation
CQS - CQSU - CQSW - CQT - CQTM - CQUIN AQ - CQV - CR - CR$ - CR&C
"CQUIN." Abbreviations.com. STANDS4 LLC, 2015. Web. 30 May 2015. <http://www.abbreviations.com/CQUIN>.