VDP coordinates with drug companies to ensure a comprehensive Texas Drug Code Index for the following programs:

  • Medicaid
  • Children’s Health Insurance Program (CHIP)
  • Children with Special Health Care Needs (CSHCN) Services Program
  • Healthy Texas Women (HTW) Program
  • Kidney Health Care (KHC) Program

HHSC requires drug companies to complete the Certificate of Information (COI) for the Vendor Drug Program (VDP) to consider drugs for coverage on the formulary. On Feb. 1, 2021, VDP will implement the browser-based eCOI application to replace the paper form (HHS Form 1326). HHSC will no longer accept the form after March 31. VDP encourages drug manufacturers to contact vdp-formulary@hhsc.state.tx.us to register for the eCOI portal.



Name Number
Texas Drug Code Index Certification of Information (COI) HHS 1326
Reconciliation of State Invoice CMS-304
Prior Quarter Adjustment Statement CMS-304a
Manufacturer Contact Form (Magellan Medicaid Administration)  
CHIP Drug Rebate Agreement HHS 1337
CSHCN Drug Rebate Agreement HHS 1343
KHC Program Drug Rebate Agreement HHS 1329
Value-Based Agreement Concept HHS 1402
HHS Data use agreement (PDF)  
HHS Uniform Terms and Conditions (PDF)