DXVn are validity flags that identify invalid or inconsistent diagnosis in the data elements DXn. There is one validity flag for each diagnosis, i.e., DXV1 is the validity flag for DX1.
The following are acceptable values for DXVn:
||indicates a valid and consistent diagnosis code.
||indicates an invalid code for the discharge date. A six-month window around the discharge date (three months before and three months after) is allowed for anticipation of or lags in response to official ICD-9-CM coding changes.
||indicates a missing (blank) diagnosis code.
||indicates that the code is inconsistent with the sex of the patient (ED1nn) or the patient's age (ED3nn or ED4nn).
This data element was discontinued in 1998. Information on the validity of a diagnosis code is retained within the data element DXn.