86789 is for the multi-step method for antibody testing that is performed on an ELISA instrument in the laboratory. CP As of this morning, the CLFS had not been updated with pricing. Per CPT Assistant...
"The new codes will allow accurate reporting and tracking of tests performed specifically for COVID-19 caused by SARS-CoV-2. Code 86328 was established as a child code to 86318 to report a qualitative or semiquantitative single-step method immunoassay for SARS-CoV-2 (COVID-19) antibody(ies). Code 86769 was established to report an antibody test for SARS-CoV-2 (Coronavirus disease [COVID-19]) using a multiple-step method. Note that code 86769 will be a child code under parent code 86710. It is represented here in its entirety, ie, complete long descriptor, including the language from parent code 86710."
I counsel my laboratories to look at the reimbursement aligned with the parent code, which in this situation is 86710. The reimbursement for 86710 is $13.55. I know that it may be confusing as to why AMA would put a Coronavirus antibody test as a child code to an influenza parent code, this is probably due to the code being based on the method of testing rather than the pathogen. CMS has increased the reimbursement for the diagnostic (molecular PCR) to $100, so I would assume that for a short time due to the pandemic that the CLFS rate for 86789 will be a little higher than the parent code reimbursement. But as you said, right now it is anyones best guess.