Please follow this link to get started with CredentialNow: https://www.medicalbusinessassociation.com/mba-credentialnow/
How can I find my Medicare Administrative Assistant Coordinator (MAC)?
You can use this document to figure out who your Medicare Administrative Assistant Coordinator (MAC) is for your state. https://www.cms.gov/Medicare/Medicare-Contracting/Medicare-Administrative-Contractors/Downloads/MACs-by-State-June-2019.pdf