Rapid Covid Reimbursement

Happy Friday everyone. I have been using Versea rapid covid tests since Nov, 2020. Initially, BCBS and other insurances were paying above cost but recently BCBS, Tricare and Sierra started paying below our cost of the test. In fact, Anthem BCBS is now paying exactly the same underpayment as United.

Any suggestions to help to get proper reimbursement. We are using 87426. I have seen talk of lab handling fees or secondary codes? Are you linking the test to certain ICD10 like z03.18? or should there be certain other codes. Thoughts?