About Rx|X

Rx|X Advisory Services Founders, Dr. Madeline Wallack and Ms. Suzanne Herzog, have spent their careers in 340B and drug pricing compliance. Dr. Wallack and Ms. Herzog started Rx|X in 2010 with the vision to create a firm that offered expert compliance services that were efficient, yet approachable. Rx|X assists hundreds of 340B entities with compliance, optimization, strategy, operations, and dispute resolution. The firm expertly preps entities for HRSA and manufacturer audits and advise on a number of compliance issues.

The founders have worked together in 340B for over 20 years. Prior to launching Rx|X, Dr. Wallack and Ms. Herzog served for several years at the Office of Inspector General (OIG) for Health and Human Services (HHS). Later they pursued contractual work with Health Resources and Services Administration’s (HRSA) Office of Pharmacy Affairs. While at the OIG and HHS, both gained direct experience with statistics, audits, program evaluation, data collection methods, data analysis, technical writing, and project management. 

Dr. Wallack and Ms. Herzog served as expert witnesses for the Supreme Court case Santa Clara v Astra et al regarding overcharging of 340B entities. From 2011-2013, Rx|X worked with the American Pharmacists Association (APhA) as part of their contract with HRSA to run the Pharmacy Services Support Center (PSSC), now the call center/education/policy assistance service run by Apexus. The firm conducted research on policy and implementation questions and authored white papers. Furthermore, they ran the Covered Entity Peer-to-Peer Program, served as speakers at 340B University, wrote standard response guides for the FAQs, and helped develop the HRSA audit process.

In 2016, Rx|X aided Apexus with the creation of the 340B Apexus Certified Expert (ACE) curriculum. In 2020, Rx|X served as ACE’s exclusive consultant helping to create the educational Update Module.

In 2024, the firm launched its inventory reconciliation tool, Avanti340B. The tool serves as a novel way to further support clients managing procurement and accumulations.