MRN
Medical record number which is a unique identifier for an
individual patient.
SOURCE_KEY, SOURCE_NAME, REF_BILL_CODE_SET_NAME
SOURCE_KEY is an integer representing the reference billing
code set being used, SOURCE_NAME is the name of the
reference billing code set being used, and REF_BILL_CC is
the abbreviation for the code set being used.
NAME, REF_BILL_CODE
NAME is the name of what the patient is being billed for and
the REF_BILL_CODE is the corresponding billing code.