Mark F. Gruenhaupt, RPh

Senior Pharmacy Management Consultant

Chicago, IL, US

Mark Gruenhaupt is a senior pharmacy management consultant with the Chicago office of Milliman. He joined the firm in 2022.

Main +1 262 784 2250 | Office +1 262 923 3699

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Experience

Mark has over 30 years of experience in the pharmacy and managed care industry. Mark’s areas of expertise include rebate and formulary strategy, clinical and plan performance analytics, pharmacy network pricing, pharmaceutical pipeline impacts, and Medicare Part D requirements and regulations. Mark has extensive experience with account and client relationship management, having worked with regional and national health plans and PBMs in both the commercial and government sectors. He leads client engagement and supports strategic projects to help payers with pharmacy benefit design and supply chain strategies that improve health and lower costs.

Prior to joining Milliman, Mark worked as director of rebate and clinical strategy for a pharmacy benefit manager, where he managed all aspects of client relations and financial operations of the pharmacy programs.

Publications and Presentations

Publications

Prescribing a Part D formulary for the new IRA world (Milliman Insight, 2024)
Payer Strategies for GLP-1 Medications for Weight Loss, (Milliman Insight, 2023)
Obesity Management Framework (Digital Health New York, 2024)
Report of Pharmacy Benefit Manager (PBM) Practices (Office of Health Strategy, State of Connecticut, 2025)

Presentations

Evolution of PBM Market Dynamics and the Impact on the Pharmacy Supply Chain (Milliman Life Science LinkedIn Live Stream, 2024)
Pharmacy Industry Disruptors (AMCP Great Plains Day of Education, 2024)
Payer Considerations for Anti-Obesity Medication Benefit Design Coverage and Management (Greater Philadelphia Business Coalition on Health, 2024)
Addressing Obesity for Affordability and Sustainability (MidAtlantic Business Group on Health, 2024)
Payer Strategies for GLP-1 Medications (Health Tech Nerds Lunch & Learn, 2024)

Professional Designations

Registered Pharmacist, Kansas
Registered Pharmacist, Missouri
Registered Pharmacist, Iowa

Education

BS Pharmacy, University of Iowa

Affiliations

Member, Academy of Managed Care Pharmacy (AMCP)
Founder / Charter Member, Great Plains Affiliate Chapter, AMCP

Publications

Read their latest work

Article

Prescribing a Part D formulary for the new IRA world

13 December 2024 - by Madeleine Cline, Justin Harris, Jian-ya Lin, Mark F. Gruenhaupt, RPh

Medicare Part D: We highlight the changes in plan incentives and key trends in 2025 formulary coverage, along with considerations for 2026.

Article

Payer strategies for GLP-1 medications for weight loss

25 August 2023 - by AJ Ally, Deana Bell, Melody Craff, Jeff Garbe, Mark F. Gruenhaupt, RPh, Peter Heinen, Ellyn Russo

We examine various strategies related to GLP-1 medications such as Wegovy when used for weight loss to help payers understand the landscape, develop a coverage strategy, and minimize waste.