LAWYER PROFILE

William T Mathias

USA 2026

Bass, Berry & Sims PLC

Ranked in 1 practice area

Healthcare

District of Columbia

1 year ranked

About

Provided by Bass, Berry & Sims PLC

Practice Areas

Bill Mathias is a healthcare regulatory attorney with a focus on fraud and abuse and Stark Law issues. He draws on over 25 years of experience to help national healthcare organizations address their thorniest healthcare regulatory issues.

He works with healthcare organizations to structure complex business arrangements, including joint ventures and strategic transactions, to manage risk while meeting their business objectives. Investors and healthcare organizations look to Bill to identify legal and compliance risks through due diligence and internal investigations and to devise strategies for managing legal risks and successfully resolving compliance issues.

Bill is a recognized authority on the federal Anti-Kickback Statute (AKS), the Stark Physician Self-Referral Law, the Eliminating Kickbacks in Recovery Act (EKRA) and the federal Civil Monetary Penalty regulations. He regularly assists with government investigations and defending False Claims Act lawsuits and other enforcement actions.

Career

Bill joined Bass, Berry & Sims in 2021; previously, Bill was a shareholder at Ober|Kaler and Baker, Donelson, Bearman, Caldwell & Berkowitz, PC where he was co-chair of the Health Law Practice Group and the Fraud & Abuse Workgroup.

Professional Memberships

American Health Law Association (AHLA) — Fraud and Compliance Forum Program Planning Committee (2024-2026); Fraud & Abuse Practice Group, Vice Chair (2008–2014), Advisory Opinion Task Force (2004–2008); Mentoring Program; Public Interest Contributor

American Bar Association — Health Law Section: Co-Chair, Washington Health Law Summit (2026); Vice Chair, Healthcare Facility Operations Interest Group (2024); Vice Chair, Health eSource Editorial Board (2024-2027); Vice Chair, Washington Health Law Summit (2025); Co-Chair, Planning Committee, Emerging Issues in Healthcare Law Conference (2022-2024)

Personal

JD, University of Maryland Francis King Carey School of Law (1996) - With honors

BA, Amherst College (1990) - cum laude

Awards

Healthcare (2026)

Chambers USA

Health Care Law (2021-2026)

The Best Lawyers in America

Best of the Best USA, Healthcare Category (2014)

Expert Guides to the Leading Lawyers

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Healthcare - District of Columbia

Band 5

Individual Editorial

William Mathias is well known for advising national healthcare organizations on complex regulatory issues. This includes Stark Law and Anti-Kickback compliance, structuring strategic transactions, and defending against enforcement actions.

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Strengths

Provided by Chambers

Bill is a really good thought partner when calibrating risk and advising on practical implications.
HealthcareChambers Guide to the USA
Bill's relationship building makes him stand out. Keeping up on industry trends strengthens his ability to keep current with not only what is happening in the law, but what other companies are doing.
HealthcareChambers Guide to the USA