Empire BCBS CHP/Medicaid plans - 90460

We have claims processed by Empire BCBS CHP/Medicaid for which that BCBS is not paying the 90460 vaccine admin fee. It seems this is unique to a “Risk” plan. BCBS returns the claims with everything but the vaccine admin code. When we call they say that code should be paid by SOMOS. When we’ve called/submitted to SOMOS, they said it’s BCBS’ responsibility.

Anyone else seen this or have any advice what to do?