, thanks for trying to get to the bottom of this troublesome issue with LabCorp and Quest codes for the ARUP Lab coxsackievirus B and echovirus antibody tests.
appears to be the LabCorp code for the ARUP Lab antibodies test, when providing a serum sample.
Coxsackie B Virus Abs LC - 816869
this will not work as it is only csf
That's strange, because this number of 816869
is the code Dr Chia uses to order the ARUP Lab coxsackievirus B antibody test.
I happen to have a copy of Dr Chia's LabCorp test requisition form that he filled out for an ME/CFS patient on this forum (see image below), and you can clearly see on this form that Chia uses LabCorp code 816869 to order the CVB antibody test.
You can also see from that form that Dr Chia uses LabCorp code 823361
for the ARUP Lab echovirus antibody test.
It's interesting that Dr Chia has handwritten on this form: "Please do not modify the test code on coxsackievirus B antibodies. Reference will accept serum". I wonder if that means Dr Chia knows that code 816869 is normally for cerebrospinal-fluid, but that ARUP will also accept serum.
Dr Chia's LabCorp Test Requisition Form