how to convert this query into merge statement in sqlserver 2008 R2?

Hi ,

i am facing this issue from last 3 days  actually the below query fulfilled my requrirement but this code is rejected by lead and asked to make it as merge statement.

my actual query is

Step-1

insertinto [dbo].[cmscpt_new]([Code],[Description],[InputOn]

 , [InputBy] ,[CptReview],[AddedbyApplication],[Status])

  select [code],[description],getdate(),'101','n','VAN','Active'

   FROM [dbo].[cpt_load_2013]

    whereisnull(current_update_indicator,'A')<>'D' andisnull(Modifier,'00')='00'

    and [code] notin(select codefrom [CMSCpt_new])

    and [description] not in(select [description]from [CMSCpt_new])

   Step-2

          update a

   set a.[description]= b.[description]

    from [cmscpt_new] a, [cpt_load_2013] b

   where a.[Code]=b.[Code]

Purpose of the above query is:

1. if code is not exist in cmscpt_new table then i need to insert code from cpt_load_2013 table if code is exist then i need to update descritpion from cpt_load_2013 to cmscpt_new table based on code .

thanks in advance

sai