Final answer:
The CIIP, or Certified Imaging Informatics Professional, is the credential that distinguishes leaders in imaging management, signifying their expertise and adherence to the concept of credentialism in the healthcare IT industry.
Step-by-step explanation:
The credential that distinguishes individuals as proven, skilled, knowledgeable leaders in the field of imaging management is the CIIP or Certified Imaging Informatics Professional. In the context of credentialism, where the emphasis is on obtaining certifications or degrees to demonstrate expertise and qualifications for specific job roles, holding a CIIP signifies that the individual has attained a specialized level of education and skill in imaging informatics, a subset of healthcare IT focused on the management of imaging data and technology.