Select strips leading zero when using cast function

SELECT INS_EMP_FEIN FROM TABLE(CAST(POC_INSURER_EMPLOYER_Q1('','FALSE','','','020170100','') AS poc_pol_emp_table_type))

INS_EMP_FEIN
------------
    20170100
    20170100
    20170100
    20170100
    20170100
    20170100
    20170100

we have tried a lpad but give us this result:

SELECT lpad(INS_EMP_FEIN,9,'0') FROM TABLE(CAST(POC_INSURER_EMPLOYER_Q1('','FALSE','','','020170100','') AS poc_pol_emp_table_type))

LPAD(INS_
---------
020170100
020170100
020170100
020170100
020170100

How do we get Oracle to display leading zeros when the column is defined as varchar2(9) in the database?

Thanks.

Bruce M