William S. Barrett

Proven Legal Leadership & Strategic Impact

William Barrett is a nationally respected corporate attorney and strategic advisor, known for guiding healthcare organizations, business leaders, and dental entrepreneurs through complex legal transitions with clarity and creativity. As CEO and Corporate Law Partner at Mandelbaum Barrett PC, Bill has spent over two decades helping clients navigate mergers, acquisitions, and practice transitions with unmatched precision.

He is regarded across the dental industry for his ability to structure high-stakes deals while preserving both business goals and professional integrity. Bill’s client-centered, solution-oriented mindset has earned him the reputation of a “deal maker” who gets things done, and done right.

Healthcare Focus & National Transactional Expertise

In the healthcare space, Bill is one of the country’s most trusted legal voices in dental and medical practice transitions.

His advisory work spans:

• Practice sales and purchases
• Associate buy-ins and start-ups
• DSO and MSO structuring
• Dental-specific employment law and compensation
• Succession planning and tax strategy

Throughout his career, he has successfully managed hundreds of practice transitions and business transactions across nearly every U.S. market. His clients include emerging DSOs, private equity firms, and independent healthcare entrepreneurs looking to scale responsibly.

Author, Speaker & Industry Thought Leader

Bill is the author of two best-selling dental business books:

• Pain-Free Dental Deals: An Entrepreneurial Dentist’s Guide to Buying, Selling, and Merging Practices
• The DSO Decision: Winning Answers from Every Angle

He frequently writes for top industry publications and delivers keynotes at national conferences, trade shows, and dental schools. His insights into DSO dynamics, exit strategies, and legal innovation are sought after by both emerging clinicians and established leaders.

As host of the Fingerprints on Success podcast, Bill interviews business and legal leaders to uncover the key moments that shaped their journeys. He’s also been featured on Dentaltown with Dr. Howard Farran and the Becker’s DSO Review Podcast.

Strategic Value to Foundation Dental Alliance

Bill’s role on the Foundation Dental Alliance Advisory Board ensures FDA dentists are protected and positioned for success in every legal, structural, and financial decision they make. He brings a blend of legal rigor, entrepreneurial understanding, and industry foresight.

He actively supports FDA members in:

• Structuring win-win transitions and partnerships
• Avoiding costly legal pitfalls in practice growth
• Navigating DSO partnerships, acquisitions, and private equity offers
• Educating the FDA community through legal updates and training

His presence reinforces the FDA’s mission of protecting dentist autonomy and amplifying long-term success through trusted partnerships and strategic clarity.

Key Areas of Expertise

• Mergers & Acquisitions (M&A)
• Dental Practice Transitions and Sales
• Employment Law & Executive Compensation
• DSO & MSO Structuring
• Succession Planning & Tax Strategy
• Corporate Governance and Outside Counsel Services

Selected Publications

• Crafting the Perfect Exit Strategy for New York Dentists, NY County Dental Society, Mar 2025
• Integrating Artificial Intelligence in Dental Healthcare, NYCDS, Sep 2024
• The Ripple Effects in Dentistry of the FTC Noncompete Ban, NYCDS, Jun 2024
• Navigating Transactions with DSOs in the Current Market, NYCDS, Dec 2024
• The Vital Role of Partnership Agreements in Dentistry, NYCDS, Sep 2023
• The Pros and Cons of Selling or Partnering with a DSO, Dental Entrepreneur, Dec 2022
• Cybersecurity for Dental Practices, NYCDS, Jun 2023
• What to Know About the DOJ’s M&A Safe Harbor Policy, Legal Dive, May 2024

Professional Affiliations

• New Jersey State Bar
• New York State Bar
• American Bar Association
• New York County Dental Society
• Fortune Management, Board of Directors
• TruBlu Dental Management, Board of Directors

Awards

• Best Lawyers in America, 2023 & 2024

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Education

• University of Virginia School of Law, J.D.
• Boston College, B.A.