Critical Care Nurse (CCRN) Critical Care Registered Nurse Acute and Critical Care Nursing for Adults CCRN® Exam American Association of Critical-Care Nurses CCRN certification American Association of Critical Care Nurses Critical Care Registered Nurse Certification for Critical Care Registered Nurses (CCRN) CCRN https://www.aacn.org/certification/get-certified/ccrn-adult CCRN (Adult) American Association of Critical-Care Nurses Critical Care Registered Nurse (CCRN)® Adult certification Certification for Critical Care Registered Nurses (CCRN) Certification for Critical Care Registered Nurses (CCRN) CCRN Initial Eligibility Requirement & Fees CCRN Critical Care Registered Nurse (CCRN)® Adult certification