It's the first field named Line_No, which is blank instead of each line getting an incremented number 1, 2, 3, etc.
VIEW:
SELECT '' AS Line_No, '' AS REJECTED, DOCNUM AS [External Claim ID], RXCLAIMNUM, MEMBER_ID, DOF, RX_NUMBER, QTY, DS, NCPDP,
RX_NETWORK_ID AS [RX Network ID], PRICING_TERM_DESC AS [Pricing Term Used for Claim], '' AS [Pharmacy AWP Discount Rate],
'' AS [Pharmacy Dispensing Fee], TOTAL_TAXED_LOE_AMOUNT AS [Total Taxed/LOE Amount], UNIT_PRICE_OF_AWP AS [Unit Price of AWP], '' AS [Unit Price of MAC],
'' AS [Ingredient Cost at AWP Discount], '' AS [Ingredient Cost at MAC], '' AS [Claim adjudicate using Lesser of logic], CLAIM_DISCOUNT_RATE AS [Claim Discount Rate],
CLAIM_DISPENSING_FEE AS [Claim Dispensing Fee], '' AS [Did Claim Adjudicate with Corect Discount/Disp Fee], '' AS [Additional Pricing review],
FORMULARY_COMPLIANCE_CODE AS [Formulary Compliance Code], '' AS [Expected Copay], '' AS [Copay for Claim], '' AS [Copay Comment],
BRAND_GENERIC_TRADEMARK AS [Brand / Generic Description],
CLAIM_OVERRIDE_REASON_CODE1 + ' ' + CLAIM_OVERRIDE_REASON_CODE2 + ' ' + CLAIM_OVERRIDE_REASON_CODE3 + ' ' + CLAIM_OVERRIDE_REASON_CODE4 +
' ' + CLAIM_OVERRIDE_REASON_CODE5 + ' ' + CLAIM_OVERRIDE_REASON_CODE6 AS [Claim Override Reason Code], '' AS [Claim Reject Code],
'' AS [Claim Reject Reason Code]
FROM dbo.tbl_FEP_PCL