Medicaid Vendor Drug Formulary Search ResultsTexas Medicaid Vendor Drug,Texas Drug Code Index, Formulary Search Results This page is maintained by the HHSC Medicaid/CHIP: Vendor Drug Program. Comments and suggestions may be addressed to: format. You will need to download the free Acrobat Reader to view these files. Access.adobe.com provides a set of free tools that may allow visually disabled users to read documents in Adobe PDF format.