IMCU Certification

Hi all,
I have been a IMCU RN for a little over a year and I am wondering if there is a certification for us, like there is CCRN for ICU nurses. Does anyone know of any certifications for IMCU nurses?
http://www.aacn.org/wd/certification...=certification

PCCN perhaps? That's what we use on my unit, which is step-down/ intermediate care. Many of the test questions are similar to corn but without the ventilator stuff or PA cath stuff.