What is the Oregon Maximum Allowable Cost (OMAC)?
A. The OMAC is the maximum amount that DMAP will reimburse for prescribed drugs. This amount is determined by DMAP’s Pharmacy Benefit Manager (PBM), the company that processes all fee-for-service pharmaceutical claims. The PBM also determines the maximum allowable cost on selected multiple-source drug designation when a bioequivalent drug product is available from at least two wholesalers serving the state of Oregon. You can access the current OMAC by GCN (PDF) or by NDC (zip file).
