1.1 There are presently no specific guidelines for Cardiovascular Magnetic Resonance (CMR) credentialing. In view of the unique and complex nature of the cardiovascular system, and the existence of multi-disciplinary practitioners in this field, the Society for Cardiovascular Magnetic Resonance (SCMR) considers it important to develop guidelines for practice in CMR. SCMR has therefore developed these guidelines to be broad-based and applicable to CMR practitioners from multiple medical backgrounds. This document was written by the Clinical Practice Committee of SCMR which is comprised of cardiovascular radiologists and cardiologists. The objective of this report is to provide guidelines to credentialing committees of healthcare facilities and agencies within the United States, although these guidelines may find application in other countries.