Combining Fields in a stored procedure

my question is this...I have to fields I want to retreive..One is a nvarchar and the other is an integer...I want to return them in this format
(interger field + '/' + nvarcharfield) as combinedfield
problem is i get errors when I try to get this value
I just need the info I know you cant add theses two together...

Example of output needed...

31/OfficeVisit

my sp

ALTER procedure EncounterCodes_NET
(
@.ClinicID int
)
as
select
CombinedField=(EnCodeID + EnCodeDesc)
from
Clinic_Encodes
Where
ClinicID=@.ClinicID
Order by Sortorderreplace the EncodeID with

Cast(EnCodeID as varchar)