Final answer:
The American Medical Billing Association administers the Certified Medical Reimbursement Specialist exam, a certification for professionals in medical billing and reimbursement.
Step-by-step explanation:
The organization responsible for administering the Certified Medical Reimbursement Specialist (CMRS) certification exam is the American Medical Billing Association (AMBA). The AMBA provides this certification as a demonstration of expertise in the field of medical billing and reimbursement. To obtain the CMRS credential, candidates must pass an extensive exam that covers various topics such as medical terminology, billing and coding, compliance, and insurance procedures.