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This variable is contained in the following files:
SAS Name
ADMTG_DGNS_CD
A diagnosis code on the institutional claim indicating the beneficiary's initial diagnosis at admission.
This diagnosis code may not be confirmed after the patient is evaluated; it may be different than the eventual diagnoses (e.g., as in PRNCPAL_DGNS_CD or ICD_DGNS_CD1-25).
Source: NCH