Facility Registry in HealthShare - What is best practice?

Hi 

we are implementing HIE and wan to get expert opinion on facility registry setup. Below are some example and which method we should adapt.

3 EMRs sending u patient data (ADT, ORU etc) for 3 facility groups

Facility Group A (Has 20 branches locations, same MRN across all branches, each branch is registered with health department)

Facility Group B (Has 30 branches locations, same MRN across all branches, each branch is registered with health department)

Facility Group C (Has only one main branch single location and is registered with health department)

Facility Registry Setup Option - 1

1) Create 20+30+1= 51 records in Facility Registry for each Facility Location Name, with different Facility Code, 2) Create 51 Facility Consents, 3) Create 51 OIDs

2) On implementation side, tell each EMR to send MSH:4 with 51 different Facility Codes representing each Facility Location

3) On Clinical View side, when Doctor search patient, he/she can see Patient-X visited Group A- Branch 11 Name and Group-B Branch 9 Name

Facility Registry Setup Option - 2

1) Create 1+1+1= 3 records in Facility Registry for each Facility Group not Facility Location, 2) Create 3 Facility Consents, 3) Create 3 OIDs

2) On implementation side, tell each EMR to send MSH:4 with 3 different Facility Codes representing each Facility Group

3) On Clinical View side, when Doctor search patient, he/she can see Patient-X visited Group A (without branch name) and Group-B (without branch name)

Not sure if i put my question clearly enough and you have face similar situation which one must decide which path to take.  Any best practice or expert inputs are appreciated.