DBIA2070    ICR (2070)

The FM r/w is to allow the Master Patient Index VistA
package to retrieve and update the Integration Control Number field via APIs.

The Direct Read access is to support the seeding process
of the last treatment date field in the Treating Facility file in the RG*1*4
patch.  The direct read will minimize the number of disk hits and effeciency
of disk hits and effeciency of the seeding which affects thousands of entries.

Temporary cross reference that lets the MPI Missing ICN
job know that a patient was added to the Patient file, via another package
other than  PIMS, and needs to get an ICN.  Once the ICN is assigned (local or
national) the cross reference is killed.

Used to create ICN History, ICN lookup capability.

Cross Reference is used to delete the 'AMPIMIS' cross
reference denoting missing ICN.

ICN History, to track changes in Integration Control
Number for each patient.  This will be used by M code to perform lookups when
ICN can't be found to see if it was used previously.

This cross-reference is used by CIRN (Clinical
Information Resource Network) for various data validation and reporting
functions.