Count (case when) not working in sql

Hi All,
I am trying to find the count of members for a perticular date range, it seems not working correclty.
Could any one help me out.
here is the query...I am getting same output for all the cases..please help
Select
t
.MemberNbr,t.patcom
count(case
when
datediff(d,
mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between
-1
and
-365
then t.MemberNbr
else 0
end)as
edvisits365daysprior
count(case
when
datediff(d,
mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between 1
and 3
then t.MemberNbr
else 0
end)as
edvisits3Days
count(case
when
datediff(d,
mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between 1
and 30
then t.MemberNbr
else 0
end)as
edvisits30Days
count(case
when
datediff(d,
mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between 1
and 60
then t.MemberNbr
else 0
end)as
edvisits60Days
count(case
when
datediff(d,
mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between 1
and 90
then t.MemberNbr
else 0
end)as
edvisits90Days
--,*--membernbr,specificdateofservice,count( membernbr)--, specificdateofservice)as visitcount--, patcom
--Into #Tmp_PPCSEDCnt1
From
stg_tbl_InPatientPrepost Mbrs
join
#Tmp_MCCSEDVisits t
on
mbrs.MemberNbr=t.MemberNbr
--where UPPER(t.MR_Line_Desc) in ('FOP EMERGENCY ROOM - HOSPITAL', 'FOP EMERGENCY ROOM Urgent Care',
--'PROF ER VISITS AND OBSERVATION CARE')
group
by t.MemberNbr,t.patcom

You may replace 0 as NULL and see how it works for you?
eg:
count(case when datediff(d, mbrs.DischargeDate,
convert(datetime,convert(varchar(12),t.specificdateofservice),112))
between -1 and -365 thent.MemberNbr else NULL end)as edvisits365daysprior

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