DEX Z code for HEA from IRL

Building an epic test make our send outs easier.  I have a CPT code for this as 81403.  My billing guy is asking for a DEX Z code.  This is going to Vitalant for workup but they're not located in the DEX website.  I've reached out to Vitalant directly but nothing yet.   How do you have your HEAs set up to bill in Epic?