CASE Statement Help Needed - SQL 2005

In my Database, I do not have a [Last Visit Date]. I have had to pull it by doing the following:

(select top 1 visit from patientvisit pv
where visit >= ISNULL(NULL,'1/1/1900') and visit < dateadd(d, 1,ISNULL(NULL,'1/1/3000')) AND
pp.patientprofileid = pv.PatientProfileID and datediff(day, getDate(), visit) < 0 order by visit desc) as [Last Visit Date]

My client would like to have a listing of patients with a visit within the past 2 years and without a visit in the past 2 years. What I would like to do is have a case statement that evaluates like:

Case
When dateadd(y,[LastVisitDate],getdate())<2 then 'Less Than 2'
When dateadd(y,[LastVisitDate],getdate())>=2 then '2 or more'
else 'No detected visit'
END

So basically, either your in 2 yrs or your not.

My Current Query:





/* Patient List*/
SET NOCOUNT ON

DECLARE @Zip varchar(40)
SELECT @Zip = LTRIM(RTRIM('NULL')) + '%';
WITH cteMedlitsPatientStatus AS
(
SELECT * FROM Medlists WHERE TableName = 'PatientProfileStatus'
)

SELECT
PatientID, RespSameAsPatient=isnull(PatientSameAsGuarantor,0),
PatientName=CASE
WHEN RTRIM(pp.Last + ' ' + ISNULL(pp.Suffix,'')) <> '' THEN
RTRIM(RTRIM(pp.Last + ' ' + ISNULL(pp.Suffix,'')) + ', ' + ISNULL(pp.First,'') + ' ' + ISNULL(pp.Middle,''))
ELSE RTRIM(ISNULL(pp.First,'') + ' ' + ISNULL(pp.Middle,''))
END,
PatientAddr1=pp.Address1, PatientAddr2=pp.Address2,
PatientCity=pp.City, PatientState=pp.State, PatientZip=pp.Zip,
PatientRespName=CASE
WHEN RTRIM(pr.Last + ' ' + ISNULL(pr.Suffix,'')) <> '' THEN
RTRIM(RTRIM(pr.Last + ' ' + ISNULL(pr.Suffix,'')) + ', ' + ISNULL(pr.First,'') + ' ' + ISNULL(pr.Middle,''))
ELSE RTRIM(ISNULL(pr.First,'') + ' ' + ISNULL(pr.Middle,''))
END,
PatientRespAddr1=pr.Address1, PatientRespAddr2=pr.Address2, PatientRespCity=pr.City,
PatientRespState=pr.State, PatientRespZip=pr.Zip, FinancialClass=isnull(ml.Description,'none'),
Doctor=df.ListName,Facility=df1.OrgName,Balance=isnull(ppa.PatBalance,0)+isnull(ppa.InsBalance,0), pp.DeathDate,
Status = ml1.Description,
pp.BirthDate,
(select top 1 visit
from patientvisit pv
where visit >= ISNULL(NULL,'1/1/1900') and
visit < dateadd(d, 1,ISNULL(NULL,'1/1/3000')) AND
pp.patientprofileid = pv.PatientProfileID
and datediff(day, getDate(), visit) < 0 order by visit desc) as [Last Visit Date]

FROM PatientProfile pp
LEFT JOIN PatientProfileAgg ppa ON pp.PatientProfileID = ppa.PatientProfileID
LEFT JOIN Guarantor pr ON pp.GuarantorID = pr.GuarantorID
LEFT JOIN MedLists ml ON pp.FinancialClassMID = ml.MedListsID
LEFT JOIN DoctorFacility df ON pp.DoctorID = df.DoctorFacilityID
LEFT JOIN DoctorFacility df1 ON pp.FacilityId = df1.DoctorFacilityID
LEFT JOIN cteMedlitsPatientStatus ml1 ON pp.PatientStatusMId = ml1.MedlistsId

WHERE etc ......