The term Hash IDcan be somewhat ambiguous. It refers to both the APCD Unique ID (ME998) and also the combination of the APCD Unique ID (ME998) + the Member Gender (ME013).
To better align with analytic terminology and and provide clear information, the new definitions are here:
APCD_Unique_ID = refers to field ME998.
Hash_ID = refers to field ME998.
Study_ID = concatenated APCD_Unique_ID (ME998) and member gender (ME013).
The term, Study_ID, will replace Hash_ID going forward.
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