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About Us

CSS Health improves population health through comprehensive medication management. Our flexible, comprehensive services integrate technology, human engagement and proven processes to identify vulnerable segments, simplify complex medication regimens, manage costs, comply with regulations, manage risk and capture untapped revenue. This delivers a measurable return on investment to health plans, pharmacies, self-insured businesses, pharmacy benefit managers and third-party administrators. It also delivers value to the end-user organizations and people our clients serve. In short: we strengthen businesses and improve lives.


CSS Leadership Bios

Jim Clair

Chief Executive Officer

CSS Health

Jim joined CSS Health in January 2020, bringing with him more than 20 years of experience in technology-enabled pharmacy services and pharmacy benefits administration. Prior to joining CSS Health, he served as CEO of Tricast, LLC, a tech-enabled pharmacy auditing firm, and previously served as CEO of Goold Health Systems, a pharmacy benefits administrator that he later ran as a wholly-owned subsidiary following its sale. Jim holds a Master of Public Administration degree from Syracuse University and earned his bachelor’s degree from the University of Massachusetts at Amherst. In addition to his role on the CSS Health Board of Managers, Jim is a director on the boards of Care & Comfort, a Maine-based home healthcare agency and Reveal Rx, a Wisconsin-based software-as-service firm offering pharmacy claims surveillance. He also serves as Board chairman for the Educare Central Maine Board of Directors, a non-profit learning and development partnership serving children.

Jim Notaro, R.Ph., Ph.D.

Founder and Chief Clinical Officer

CSS Health

Jim founded CSS Health in November 2000 after a career that spanned managed care, community pharmacy, and home-care and long-term care pharmacy. Prior to founding CSS Health, he served as Director of Pharmacy and Ancillary Clinical Services for Univera, a Managed Care Organization based in Western New York. Previously, he served as Director of Managed Care Programs / Research and Development at Centrus, a regional prescription benefit manager based in Albany, New York. He spent more than 15 years as an assistant professor in the Department of Health Services Administration at D’Youville College, and today teaches master’s level coursework in epidemiology in the Department of Health Services Administration at Queens University. Jim earned a degree in pharmacy from Albany College, a master’s degree in health administration from Union College, and earned his Ph.D. in operations research from the University of North Carolina at Chapel Hill. He is a licensed pharmacist in New York and North Carolina.

Miklos Van Halen

CTO and VP of Product

CSS Health

Miklos joined CSS Health in November 2021 and oversees the Software Engineering and Product Development functions. He has over 20 years of experience with both private sector and government entities, and brings with him a wealth of experience in healthcare, payer and provider data exchange systems, and policies. Prior to joining CSS Health, he served in a number of leadership roles, including Senior Director of Product Engineering at Goold Health Systems where he managed the software development and data warehouse departments. Miklos’ background also includes a Computer Engineering degree from Auburn University, PMP certification, and is a Certified Enterprise Architect.

Liam Brenner

Interim COO

CSS Health Payer Services Unit

Liam Brenner is the acting COO of CSS Health’s Payer Services team and has worked with the Company since February 2022, which is his second stint with the Company on an outsourced basis. He is currently a partner with TechCXO, a professional services firm that provides experienced, C-Suite professionals to deliver strategic and functional consulting services for technology companies. Most recently, prior to rejoining TechCXO and CSS Health, Liam was part of the founding management team for Haven, the Amazon, Berkshire, JP Morgan Chase joint venture where he served as both Head of Finance and Head of People. For more than 25 years, he has consistently delivered exceptional results as a CEO, CFO and COO for both client companies and owned or started ventures. Liam has primarily worked with early stage companies, with healthtech and tech enabled companies being a focus for the last 10 years. Liam has an MBA from Babson College‘s F.W. Olin Graduate School of Business. He also received his BS in Accounting from Babson.​

Perry Larson

Chief Operating Officer

CSS Health Pharmacy Services

Perry joined CSS Health in January 2017 and previously served as the company’s Vice President of Sales and Marketing. Prior to joining CSS Health, he spent more than 30 years working in pharmacy systems, packaging, and automation. Previous positions include Executive Vice President of Business Development at Manchac Technologies and Vice President of Sales at MTS Medication Technologies. Perry earned his bachelor’s degree in Business Administration from Fort Lewis College.

Katherine Chudow

Vice President, Finance and Administration

CSS Health

Katherine is a veteran of the healthcare industry who joined CSS Health in May 2015. Her more than 20 years of experience spans home health, long-term care, acute care, physician practice management. Prior to her tenure at CSS Health, Katherine spent nine years as Chief Financial Officer at Senior Care Group and previously served as Corporate Controller at Grace Senior Services, Director of Financial Operations at Mobile Medical Industries, and Regional Controller at Home Health Care of America. She holds a Master of Science degree in Accounting from Long Island University and a Bachelor of Science degree in Medical Technology from the State University of New York at Stony Brook.