MedExpert
The Medical
Decision Company.
MedExpert provides every individual with current, unbiased, and accurate information to make the most appropriate medical and health decisions. For every man, woman, and child — better information, better decisions, better outcomes.
Conflict-free
by design.
MedExpert has no financial ties to any organizations that could influence patient decisions for financial purposes — no arrangements with pharmaceutical companies, provider groups, or hospitals that could present a conflict of interest. The advice we deliver to members serves them, not a vendor.
A decade
of engineering.
MedExpert invested more than a decade engineering evidence-based medicine into a platform that can cost-effectively deliver decision support, navigation, and data-analytic services — all incorporating 100% of a payer's data sources in near real time. The result: a Healthcare Decision System unlike anything else in the market.
MedExpert Visionaries.
MedExpert is shaped by a remarkable team of leaders from healthcare, health policy, engineering, artificial intelligence, and business — each playing a pivotal role in building MedExpert's AI-driven, evidence-based decision systems and grounding them in patient-first principles.
Mary Hiller
Mary Hiller is a pioneer in medical information and knowledge engineering with over 40 years of experience at the intersection of health systems, medical research, and artificial intelligence.
As President of MedExpert International, she is the chief architect behind the company's innovative systems designed to identify evidence-based medicine through a sophisticated set of algorithms. The platform leverages AI, machine learning, and human pattern recognition to deliver objective, medically validated decision support.
With a background in biology from Santa Clara University and early career research in leukemia at Stanford University, Mary has long championed the translation of complex medical knowledge into actionable insights. Her tenure as medical information director at the Palo Alto Medical Foundation (now Sutter Health) laid the foundation for her lifelong focus on improving access to accurate, data-driven medical guidance.
In her decades-long leadership at MedExpert, Mary has utilized her expertise in direct decision support by applying rigorous scientific standards to the identification of best-evidence practices, which helps patients and providers make better, more cost-effective decisions. Her critical work continues to shape the future of medical information and health system innovation.
Maryann Mason
Maryann Mason is a prominent leader in the healthcare technology sector, currently serving as Senior Vice President of Medical Informatics at MedExpert International. In this role, she leads efforts to harness advanced technology and data-driven systems to improve member outcomes, ensuring services are effective, transparent, and of the highest quality. Her work reflects a deep commitment to transforming healthcare delivery through strategic, innovative solutions embedded throughout MedExpert's operations.
Mason has a longstanding history with MedExpert and brings a cross-disciplinary command of healthcare informatics. She plays a pivotal role in aligning engineering, data management, analytics, and client services — driving the collaboration necessary to fulfill the company's mission. Her leadership in new product and program development emphasizes measurable outcomes and continuous improvement, grounded in integrity and regulatory compliance. Notably, she directed the national Centers for Medicare & Medicaid Innovation (CMMI) MedExpert Program and has led transformative initiatives for state Medicaid transparency efforts.
As a key spokesperson for MedExpert, Mason engages regularly in national-level discussions on healthcare innovation, transparency, and patient empowerment. A compelling advocate for direct decision support, she is known for her ability to clearly convey complex clinical and technical concepts, earning her recognition as a trusted voice among policymakers, health plans, and industry leaders. Her forward-thinking perspective consistently champions technologies that prioritize patient needs and long-term system value.
Mason's academic foundation reflects her commitment to continuous learning and rigorous problem-solving. She holds a bachelor's degree in Information Systems and Industrial & Systems Engineering and a master's degree in Operations Research from the University of Southern California Viterbi School of Engineering. She is currently expanding her expertise in artificial intelligence through executive coursework at The Wharton School, applying emerging AI tools to enhance decision support and healthcare system performance.
Beyond her professional achievements, Mason maintains an active lifestyle and a passion for exploration. A former All-American swimmer for the USC Trojans, she brings the same discipline and intensity to every pursuit. Based in the San Francisco Bay Area, she regularly engages in outdoor fitness and wellness activities that reflect her personal values and leadership approach. She is also a licensed instrument-rated private pilot, a role that underscores her adventurous spirit and forward-driving mindset, professionally and personally.
With her distinctive blend of technical expertise, visionary leadership, and unwavering commitment to patient-centered innovation, Maryann Mason is reshaping the future of healthcare. Her impact continues to drive measurable improvements in care delivery across both public and private sectors of the national healthcare system.
Larry Smarr, PhD
Founding director of the California Institute for Telecommunications and Information Technology (Cal-(IT)²) and the National Center for Supercomputing Applications at UIUC, where he led the development of Mosaic — the web browser that became the foundation for Netscape and Microsoft Internet Explorer. A member of the National Academy of Engineering, Dr. Smarr brought engineering and informatics expertise that ensured MedExpert's technology would be efficient, scalable, and built for healthcare's complexity.
Peter Szolovits, PhD
Professor of Computer Science and Engineering at MIT and head of the Clinical Decision-Making Group within the MIT Computer Science and Artificial Intelligence Laboratory. A world authority and pioneer in medical AI, Dr. Szolovits led the field toward reasoning about disease mechanisms, temporal evolution, and model-based clinical inference. He is a member of the National Academy of Medicine and a fellow of multiple AI and informatics academies.
Brian Biles, MD, MPH
Professor and Emeritus Chair of the Department of Health Services Management and Policy at George Washington University. Dr. Biles served seven years as staff director of the House Ways and Means Subcommittee on Health, then as Deputy Assistant Secretary for Health under the Clinton Administration. His career has focused on Medicare, health financing, and informed medical decision-making.
David Lawrence, MD
Former CEO and Chairman of Kaiser Foundation Health Plan and Hospitals. Dr. Lawrence's experience leading one of the nation's largest integrated health systems provided invaluable real-world testing for MedExpert's AI — assessing how the automated EBM system would perform against traditional teams of clinicians manually generating patient-specific guidelines. A member of the Institute of Medicine, he is the author of From Chaos to Care: The Promise of Team-Based Medicine.
Marilyn Moon, PhD
Emeritus Vice President and Director of the Health Program at the American Institutes for Research. A nationally recognized expert in Medicare, aging, and health care financing, Dr. Moon served as one of two public trustees of the Social Security and Medicare trust funds and is Program Director for the Commonwealth Fund's Program on Medicare's Future. She is a member of the Institute of Medicine.
John Rother
Former Director of Policy and Strategy at AARP, where he advocated for the interests of more than 42 million senior citizens. Previously served eight years in the U.S. Senate as Special Counsel for Labor and Health, and as Staff Director and Chief Counsel for the Special Committee on Aging. A leading authority on aging, long-term care, Social Security, and pensions.
Philip R. Lee, MD
A distinguished physician, health policy expert, and public health advocate. Dr. Lee served as Assistant Secretary for Health under Presidents Johnson and Clinton, played a pivotal role in the implementation of Medicare, and helped found the Philip R. Lee Institute for Health Policy Studies at UCSF. At MedExpert, his monthly meetings with Medicare and policy leaders ensured that the platform's AI was designed with patient-first principles aligned with regulatory needs.
Robert "Bob" Swanson
Co-founder of Genentech (1976) — one of the world's first biotechnology companies — and a pioneering figure in biotech. After founding K&E Management, Bob worked closely with MedExpert from 1998 until his passing in December 1999, refining medical decision systems and developing business cases for evidence-based medicine. He was the last person to work with MedExpert's manual algorithms before the transition to fully automated AI in 2000.
Get in touch.
We'll learn about your population and current vendor stack, share where MedExpert tends to drive the most measurable impact, and — if it's a fit — schedule a tailored conversation.