A sequential number assigned by the submitter to identify each record segment row in the submission file. The Record Number, in conjunction with the Record Identifier, uniquely identifies a single record within the submission file.

A state-assigned unique identification number used to identify a Medicaid/CHIP enrolled individual (except on service tracking payments). Value may be an SSN, temporary SSN or State-assigned eligible individual identifier. MSIS Identification Numbers are a unique "key" value used to maintain referential integrity of data distributed over multiples files, segments and reporting periods. See T-MSIS Guidance Document, "CMS Guidance: Reporting Shared MSIS Identification Numbers" for information on reporting the MSIS Identification Numbers ID for pregnant women, unborn children, mothers, and their deemed newborns younger than 1 year of age who share the same MSIS Identification Number. https://www.medicaid.gov/medicaid/data-and-systems/macbis/tmsis/tmsis-blog/entry/47572

A data element to capture the various identifiers assigned to Medicaid and CHIP beneficiary by various entities. The specific type of identifier is shown in the corresponding value in the Eligible Identifier Type data element. States should provide all Old MSIS Identification Number with Eligible Identifier Type = 2 to T-MSIS in case the state changes the MSIS Identification Number of a beneficiary. The state should submit updates to T-MSIS whenever an identifier is retired or issued. States should provide Old MSIS Identification Number with Reason for Change = 'MERGE' to T-MSIS if the state was reporting multiple MSIS Identification Numbers for a single beneficiary and merges them under a single MSIS Identification Number. States should provide Old MSIS Identification Number with Reason for Change = 'UNMERGE' to T-MSIS if the state unmerges a beneficiary from another beneficiary. For example, if a newborn child is originally reported with the mother's MSIS Identification Number and is then assigned a different MSIS Identification Number. States should provide Old MSIS Identification Number with Reason for Change = 'LSE' to T-MSIS if the state assigns a new MSIS Identification Number to any beneficiaries during large system enhancement in state MMIS. States should provide Old MSIS Identification Number with Reason for Change = 'TCAM' to T-MSIS if the Medicaid and Separate CHIP programs use different MSIS Identifier Number schemas and beneficiaries are transferred from CHIP to Medicaid or from Medicaid to CHIP and a new MSIS Identification Number is issued.

A free text field for the submitting state to enter whatever information it chooses.