III.3.3.1 Date of Diagnosis

III.3.3.1 Date of Diagnosis Flag

This data item is used to explain why there is no appropriate value in the corresponding date field.

Depending on the registry software, these codes may be applied in the background and may not be apparent to the registrar.
Since only actual known dates are entered in interoperable date items, flags are used to explain the reason the date field is blank.
The date of diagnosis flag should only be used for non-analytic case with an unknown month and year of diagnosis.

Code	Description
12	Date of Diagnosis cannot be determined
Blank	Full or partial date recorded