Suppress Output For One Column...SOLVED

Is there a way to supress output on one column in a SP, using data from the same row?

Like This:
SELECT Last, First, DOP, dbo.fnDueDate(DOP, 3, GETDATE()) AS NextQDue, dbo.fnDueDate(DOP, 6, GETDATE()) AS NextNSPDue, DATEADD(m, 1, DOP)AS InitialNSPDue, DATEADD(m, 1, DOP) AS InitialAssessDue, DOT, DisReason, DATEADD(m, 1, DOT) AS DisSummDue, Facility, Active
FROM dbo.tblResidents

But which returns null for some of the columns if DOT is not null?
DOT is the Termination Date, so the only columns that have any meaning once there is data in the DOT column are DisReason and DisSummDue. Also, if DOT *is* null, then the above columns also have no meaning.
I tried several variations of the following, but I can't figure it out

CREATE PROCEDURE [dbo].[spTesting] AS
BEGIN
SELECT Last, First, DOP, dbo.fnDueDate(DOP, 3, GETDATE()) AS NextQDue, dbo.fnDueDate(DOP, 6, GETDATE()) AS NextNSPDue, DATEADD(m, 1, DOP) AS InitialNSPDue, DATEADD(m, 1, DOP) AS InitialAssessDue, Facility
FROM dbo.tblResidents A
WHERE DOT IS NULL
UNION
SELECT Last, First, DOP, DOT, DisReason, DATEADD(m, 1, DOT) AS DisSummDue, Facility
FROM dbo.tblResidents I
END
GO

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-Stephen