Purpose of Chapter

01 - Purpose of Chapter (Rev. 3441, Issued: 01-15-16, Effective; 12-31-13; ASC X12: 01-01-12, MAC Implementation: 02-16-16; ASC X12: 02-16-16) This chapter describes general requirements with respect to verifying an individual’s Medicare eligibility and entitlement status for providers, suppliers, A/B MACs (A), (B), and (HHH), and DME MACs. It also includes general requirements for hospitals for determining the source admission for use later in the claims process.