US · guidance
CMS Pub. 100-05, ch. 5, § 70.5.2
Exhibit 2: Survey of Bills Reviewed
The term Medicare beneficiary identifier (Mbi) is a general term describing a
beneficiary's Medicare identification number. For purposes of this manual, Medicare
beneficiary identifier references both the Health Insurance Claim Number (HICN) and
the Medicare Beneficiary Identifier (MBI) during the new Medicare card transition
period and after for certain business areas that will continue to use the HICN as part of
their processes.
Name of Beneficiary Mbi Bill Type
Follow-Up Action Needed
(Action Date)
History
(Rev. 125, Issued: 03-22-19, Effective: 04-22-19, Implementation: 04-22-19)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
97028f434004066b9c10c9816b1ab917759b0e0a9c232cdf108f664a16eb0b85
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