Final answer:
The National Committee for Quality Assurance (NCQA) requires the re-verification of a healthcare provider's state medical license at the time of recredentialing.
Step-by-step explanation:
According to the National Committee for Quality Assurance (NCQA), the primary credential that must be verified at the time of recredentialing is B) State medical license.
The NCQA is a private, non-profit organization that works to improve healthcare quality through the administration of evidence-based standards, measures, programs, and accreditation. The organization requires the periodic re-verification of a healthcare provider's state medical license to ensure that they continue to meet the requirements necessary to provide quality medical care.
Learn more about Recredentialing