Andrew Tsui

Andrew is a partner in the Healthcare practice, advising healthcare providers, medical technology companies, and life sciences organizations on Medicare and Medicaid reimbursement, CMS regulatory compliance, and healthcare administrative law. His practice focuses on helping clients understand and respond strategically to federal healthcare policy in ways that support reimbursement stability and long-term business objectives.

With a deep understanding of federal healthcare programs, administrative law frameworks, and CMS policies, Andrew works closely with hospitals and health systems, clinical laboratories, home health and hospice providers, suppliers, and other post-acute and ancillary providers. Clients rely on his guidance to make informed regulatory decisions in an environment of heightened enforcement and increasing scrutiny of reimbursement practices.

Andrew advises healthcare organizations on Medicare and Medicaid reimbursement matters, including administrative appeals, government audits, and regulatory investigations, as well as disputes involving commercial payors and Medicare Advantage plans. He regularly guides clients through annual payment updates and industry-shaping federal rulemakings, with a focus on how those changes affect revenue, operations, and compliance risk.

A key part of Andrew’s practice involves analyzing the statutory authority for agency action, including under the Affordable Care Act, and assessing whether policies are likely to endure. He also counsels clients participating in alternative payment models and value-based care arrangements — such as Accountable Care Organizations, bundled payment programs, and CMS Innovation Center initiatives — where regulatory uncertainty and reimbursement risk are especially high.

Before entering private practice, Andrew spent more than a decade at the U.S. Department of Health and Human Services, Office of the General Counsel, representing the Centers for Medicare & Medicaid Services (“CMS”). There, he gained first-hand insight into how CMS policies are developed, implemented, and defended, and how administrative law principles define the limits of agency authority. Prior to joining AGG, he practiced at one of the world’s largest global law firms.

Andrew frequently speaks on healthcare regulatory and reimbursement issues and is an adjunct professor of health law at NYU’s Wagner Graduate School of Public Service. He serves on the University of North Carolina Board of Visitors and has been recognized by The Legal 500.

Clients value Andrew’s ability to assess regulatory risk early, explain complex policy issues clearly, and provide advice that is both practical and grounded in how CMS operates. He is known for helping organizations cut through uncertainty and understand what regulatory change means for their business in real terms.

With a reputation for helping clients pursue strategies that can withstand policy changes, enforcement scrutiny, and legal challenge, clients trust him to not only respond to regulatory change, but to anticipate it, preserve flexibility, and protect reimbursement and business objectives.