Frequently Asked Questions

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What is the timeline for the use of HICN or the new Medicare Beneficiary Identifier (MBI) when searching for a beneficiary in MARx?

During the New Medicare Card Project transition period beginning April 1, 2018 through December 31, 2019, MARx will accept either the HICN or MBI. After the transition has ended, MARx will only accept the MBI as the Beneficiary ID.

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