ANSI X12 837P - 5010 2010BA REF - Subscriber Secondary Identification
The 2010BA REF Subscriber Secondary Identification Segment is required when a secondary number is necessary to identify the entity.
The 5010 specifications for the REF segment can be found below as it pertains to the 2010BA loop.
Sample 837P (5010) - 2010BA REF - Subscriber Secondary Identification
- Subscriber Secondary Identification (2010BA)
HIPAA Guide - 837P 
|R||REF||01||Reference Identification Qualifier||M||ID||3||
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