SQL Assigning Null Value to Duplicate Variables

Hello Experts,

I am using the following stored procedure to do an insert into a table.

USE [NGTest]
GO
/****** Object:  StoredProcedure [dbo].[LMC_Finalize_Split_Procedure3]    Script Date: 02/12/2014 14:49:55 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER OFF
GO

ALTER PROCEDURE [dbo].[LMC_Finalize_Split_Procedure3]
  @enterprise_id VARCHAR(5),
  @practice_id VARCHAR(4),
  @person_id CHAR(36),
  @enc_timestamp DATETIME,
  @user_id       INT,
  @enc_id        VARCHAR(36),
  @cpt_code		 VARCHAR(30),
  @provider_id   VARCHAR(36),
  @location_id   VARCHAR(36), 
  @offset		 int	-- This procedur number, to offset the ICDs
  
AS

BEGIN	
	DECLARE @pp_uniq_id UNIQUEIDENTIFIER; 
	DECLARE @serviceItemLibraryID UNIQUEIDENTIFIER;
	DECLARE @serviceItem varchar(100);
	
	SET @serviceItemLibraryID = '00CB861F-B72F-47B9-8BAD-669ED330B3E2';-- [LMA] hardcoded! probably need to be changed in future versions
	SET @pp_uniq_id = NEWID(); 
	
	-- (LMA) The service Item should not be confused with the CPT Code. They could be different. 
	SELECT @serviceItem = service_item_id
	FROM service_item_mstr 
	WHERE cpt4_code_id = @cpt_code
	AND service_item_lib_id = @serviceItemLibraryID;
	
	IF @serviceItem IS NULL 
	BEGIN
		/* debug infpormation 
		--INSERT INTO lma_debug (text) values ('Could not find a service item for ' + @cpt_code);
		
		PRINT "Invalid Service Item ID"; */
		RETURN
	END
	
	
		--,(select isnull(dx_code, 'V70.0') from ##ICDs where row_num =  (@offset * 4) -3)
--           ,(select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = 
--								(select isnull(dx_code, 'V70.0') from ##ICDs where row_num =  (@offset * 4) -3 )
								
declare @diag_code_1 varchar(10)
declare @lib_id_1 varchar(36)
declare @diag_code_2 varchar(10)
declare @lib_id_2 varchar(36)
declare @diag_code_3 varchar(10)
declare @lib_id_3 varchar(36)
declare @diag_code_4 varchar(10)
declare @lib_id_4 varchar(36)

set @diag_code_1 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -3)

if @diag_code_1 is null
    begin
	     set @diag_code_1 = 'V70.0'
	end
	
set @lib_id_1 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_1)



set @diag_code_2 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -2)

if @diag_code_2 is null
    begin
	     set @diag_code_2 = 'V70.0'
	end
	
set @lib_id_2 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_2)



set @diag_code_3 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -1)

if @diag_code_3 is null
    begin
	     set @diag_code_3 = 'V70.0'
	end
	
set @lib_id_3 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_3)



set @diag_code_4 = (select dx_code from ##ICDs where row_num =  (@offset * 4))

if @diag_code_4 is null
    begin
	     set @diag_code_4 = 'V70.0'
	end
	
set @lib_id_4 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_4)

	INSERT INTO [dbo].[patient_procedure]
           ([uniq_id]
           ,[enterprise_id]
           ,[practice_id]
           ,[person_id]
           ,[enc_id]
           ,[service_item_lib_id]
           ,[service_item_group_name]
           ,[service_item_id]
           ,[service_item_desc]
           ,[cpt4_code_id]
           ,[service_date]
           ,[provider_id]
           ,[referring_provider_name]
           ,[date_resolved]
           ,[diagnosis_code_id_1]
           ,[diagnosis_code_lib_id_1]
           ,[diagnosis_code_id_2]
           ,[diagnosis_code_lib_id_2]
           ,[diagnosis_code_id_3]
           ,[diagnosis_code_lib_id_3]
           ,[diagnosis_code_id_4]
           ,[diagnosis_code_lib_id_4]
           ,[place_of_service]
           ,[accept_assign_ind]
           ,[units]
           ,[location_id]
           ,[amount]
           ,[suppress_billing_ind]
           ,[tooth]
           ,[surface]
           ,[quadrant]
           ,[delete_ind]
           ,[note]
           ,[created_by]
           ,[modified_by]
           ,[create_timestamp]
           ,[modify_timestamp]
           ,[start_time]
           ,[stop_time]
           ,[total_time]
		   ,[alt_code]
           ,[anesthesia_billing_ind]
           ,[diagnosis_code_id_5]
           ,[diagnosis_code_lib_id_5]
           ,[diagnosis_code_id_6]
           ,[diagnosis_code_lib_id_6]
           ,[diagnosis_code_id_7]
           ,[diagnosis_code_lib_id_7]
           ,[diagnosis_code_id_8]
           ,[diagnosis_code_lib_id_8]
           ,[source_product_id]
           ,[create_timestamp_tz]
           ,[modify_timestamp_tz]
           ,[rx_on_file_ind]
           ,[national_drug_code])
     VALUES
           (@pp_uniq_id
           ,@enterprise_id
           ,@practice_id
           ,@person_id
           ,@enc_id
           ,@serviceItemLibraryID
           ,''
           ,@serviceItem
           ,(select top 1 description from cpt4_code_mstr where cpt4_code_id = @cpt_code)
           ,@cpt_code
           ,(select convert(nvarchar(8), enc_timestamp, 112) from patient_encounter where enc_id = @enc_id)
           ,@provider_id
           ,''
           ,''
           ,@diag_code_1
           ,@lib_id_1
           ,@diag_code_2
           ,@lib_id_2
           ,@diag_code_3
           ,@lib_id_3
           ,@diag_code_4
           ,@lib_id_4
           ,''  --111  --!!!!!!!????????? [place_of_service]
           ,''
           ,1
           ,@location_id
           ,(select top 1 current_price from service_item_mstr where cpt4_code_id =  @cpt_code) --!!!!!!!????????? [amount]
           ,'N'
           ,''
           ,''
           ,''
           ,'N'
           ,''
           ,@user_id
           ,@user_id
           ,CURRENT_TIMESTAMP
           ,CURRENT_TIMESTAMP
           ,''
           ,''
           ,''
           ,''
           ,'N'
           ,NULL
           ,NULL
           ,NULL
           ,NULL
           ,NULL
           ,NULL
           ,NULL
           ,NULL
           ,'EHR'
           ,0
           ,0
           ,'N'
           ,'')
           
		-- [LMA] Link to pending charges so EPM knows there are pending charges
		INSERT INTO pending_charge
			(practice_id, uniq_id, enc_id, create_timestamp, created_by, modify_timestamp, modified_by)
		VALUES
			(@practice_id, @pp_uniq_id, @enc_id, CURRENT_TIMESTAMP, @user_id, CURRENT_TIMESTAMP, @user_id); 

END

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I am mostly concerned with this section here.

declare @diag_code_1 varchar(10)
declare @lib_id_1 varchar(36)
declare @diag_code_2 varchar(10)
declare @lib_id_2 varchar(36)
declare @diag_code_3 varchar(10)
declare @lib_id_3 varchar(36)
declare @diag_code_4 varchar(10)
declare @lib_id_4 varchar(36)

set @diag_code_1 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -3)

if @diag_code_1 is null
    begin
	     set @diag_code_1 = 'V70.0'
	end
	
set @lib_id_1 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_1)



set @diag_code_2 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -2)

if @diag_code_2 is null
    begin
	     set @diag_code_2 = 'V70.0'
	end
	
set @lib_id_2 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_2)



set @diag_code_3 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -1)

if @diag_code_3 is null
    begin
	     set @diag_code_3 = 'V70.0'
	end
	
set @lib_id_3 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_3)



set @diag_code_4 = (select dx_code from ##ICDs where row_num =  (@offset * 4))

if @diag_code_4 is null
    begin
	     set @diag_code_4 = 'V70.0'
	end
	
set @lib_id_4 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_4)

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Essentially in the insert later on in the procedure i can only enter the 'V70.0' into one of the diagnosis_code_id columns ([diagnosis_code_id_1] through [diagnosis_code_id_4]) or else it will cause errors. If 2 or more of the diag_code variables have a value 'V70.0' i only need one of them to hold the variable and the rest need to be set back to null. Any ideas on a how to accomplish this?
robthomas09Asked:
Who is Participating?
 
Surendra NathConnect With a Mentor Technology LeadCommented:
you can try the below code

DECLARE @TEMP INT
SET @TEMP = 0

if @diag_code_1 is null
    begin
             SET @TEMP = 1
	     set @diag_code_1 = 'V70.0'
	end
	
set @lib_id_1 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_1)



set @diag_code_2 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -2)

if @diag_code_2 is null
    begin
             IF @TEMP = 0
             BEGIN 
	         set @diag_code_2 = 'V70.0'
                 SET @TEMP = 1
             END
	end
	
set @lib_id_2 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_2)



set @diag_code_3 = (select dx_code from ##ICDs where row_num =  (@offset * 4) -1)

if @diag_code_3 is null
    begin
             IF @TEMP = 0
             BEGIN
	        set @diag_code_3 = 'V70.0'
                SET @TEMP = 1
             END
	end
	
set @lib_id_3 = (select diagnosis_code_lib_id from diagnosis_code_mstr where icd9cm_code_id = @diag_code_3)



set @diag_code_4 = (select dx_code from ##ICDs where row_num =  (@offset * 4))

if @diag_code_4 is null
    begin
             IF @TEMP = 0
             BEGIN
	         set @diag_code_4 = 'V70.0'
                 SET @TEMP = 1
             END
	end

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