William S. Barrett, CEO

William S. Barrett, CEO


William Barrett is the Chief Executive Officer of Mandelbaum Barrett PC. He has over 20 years of experience representing a wide range of businesses with a unique specialty in mergers and acquisitions. He provides strategic advice to companies and organizations of all sizes from formation to dissolution and every stage in between. He is known for the personal attention that he gives his clients and the energy he brings to every deal. Bill has a reputation as a deal maker who knows how to be creative and get things done.

Bill often serves the role as outside general corporate counsel to his clients and advises them on issues concerning contracts, employment law compliance, developing policies, executive compensation programs and agreements, as well as business succession and related tax planning. His representative clients include commercial organizations and entrepreneurs in the areas of manufacturing, industry, service, banking, finance, insurance, construction, real estate development, as well as healthcare professionals of varying disciplines and organizations. Throughout his career, Bill has successfully managed the purchase or sale of hundreds of businesses, professional practices and facilities.

In the healthcare space, Bill is well recognized nationally as a transactional lawyer in dental and medical practice transitions, practice sales and purchases, associate buy-ins, start-ups, and the structuring of dental services organizations (DSOs) and management services organizations (MSOs). Bill represents clients throughout the country and is well versed in the specific rules and regulations that govern the healthcare industry.

He is the author of “Pain-Free Dental Deals: An Entrepreneurial Dentist’s Guide to Buying, Selling and Merging Practices” and “The DSO Decision: Winning Answers from Every Angle.” He has written many articles addressing the legal and business needs of licensed professionals and facilities. He regularly speaks on a wide variety of topics to professional tradeshows, associations, study groups, societies, as well as students and residents at dental and medical schools across the country.  Bill has also appeared on Howard Farran’s well-regarded show Dentaltown to talk about practice transitions (click here) and Becker’s Healthcare Review DSO Podcast (click here).

  • 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

NJBiz Leaders in Law, 2023

NJBiz Power 50 Law, 2023

ROI-NJ Influencers in the Law, 2023

ROI-NJ Influencers in the Law, 2022

Best Lawyers, 2023, 2024

*No aspect of these awards has been approved by the Supreme Court of New Jersey or the American Bar Association. A description of the standard or methodology used by ROI-NJ can be found here, Best Lawyers can be found here and that used by NJBiz can be found here.*

  • State of New Jersey, 1998
  • State of New York, 1999

  • University of Virginia School of Law, J.D., 1998
  • Boston College, B.A., 1994

Becker’s Healthcare DSO Review Podcast – Click here to listen

Deal Alert: Our National Dental Law Group Worked with a Client on the Sale of a Cosmetic Dentistry and General Dentistry Practice

November 11, 2022

Members of the National Dental Law Group at Mandelbaum Barrett PC including William Barrett, Barry Schwartz, Melody Lins, Nicole Fryer, Michael Lipari, and Steve Holt worked with a client on the sale of a cosmetic dentistry and general dentistry practice. The seller was acquired by a dental support organization (“DSO”) with a large footprint in […]

Avoiding Litigation Pitfalls in Dental Practice Transactions

August 30, 2023

Lawsuits involving dental practice transactions are more common than one might imagine.  In addition to the monetary and reputational costs of litigation, the mental, and even physical toll of a lawsuit is significant.  Given the stakes, this article aims to highlight some ways dentists can avoid litigation pitfalls as they contemplate or prepare for a […]

The Four-Phase DSO Transaction Process: What to Expect When Selling a Dental Practice

November 9, 2022

The prevalence of dental support organizations (DSOs) and the competitive purchase prices they offer, has led many dentists and dental practice owners to decide to sell their practice. As this consolidation trend will likely continue for the foreseeable future, it is in the best interests of private practice owners to understand what to expect when […]

Navigating Types of Dental Transactions & the Financial Terms to Know

August 2, 2022

It is imperative that dentists ask three financial questions to ensure a deal is advantageous to them: how much is being paid to the seller; where is the money to pay the seller coming from; and when will the seller receive payment? To determine the answers to these questions dentists looking to buy or sell a […]

Potential Capital Gains Rate Increase May Supercharge Already White Hot Dental M&A Market

June 25, 2021

If you're a dentist who is contemplating a practice transition, it's important to recognize that a material increase in the capital gains rate is a likely outcome this year, and that change will have significant adverse tax consequences if you sell after December 31.

New Book Injects the Novocaine Dental Entrepreneurs Need to Make Their Dental Practice Transitions Pain Free

June 3, 2021

ROSELAND, N.J. – June 3, 2021 – PRLog — Pain-Free Dental Deals: An Entrepreneurial Dentist’s Guide to Buying, Selling, and Merging Practices, by William S. Barrett with Casey Gocel (Ethos Collective™) demystifies what seems like an impossible process. William S. Barrett, CEO of the law firm Mandelbaum Barrett PC has been guiding clients through the […]

Get To Know the Drill: Picking the Right Business Entity For Your Dental Practice

September 23, 2019

September 23, 2019 Choosing the right business structure for your dental practice is a vital decision that can have significant consequences for the future of your practice. If a dentist selects the wrong structure, it can cost their business thousands of dollars down the line. Choosing the correct business structure for your dental practice is […]

How To Go Green in the Dental Industry

September 16, 2019

September 16, 2019 The “go green” movement has been sweeping over the nation for the last decade, but it can be overwhelming for many business owners to adopt more eco-friendly practices. The goal of the movement is to be aware of our impact on the environment and reduce the amount of waste we produce as […]

Impact of Offshore Dental Laboratories on the Dental Industry

September 9, 2019

September 9, 2019 Over the last decade, the number of dental labs in the United States fell by fifty percent, while the percentage of cases sent to offshore labs rose steadily. According to the FDA, $1.32 billion of dental laboratory orders are now being completed offshore, which makes up around 38% of dental restorations. The […]

The Impact of Cannabis use in Dental Practices

September 4, 2019

September 4, 2019 Even though cannabis remains illegal at the federal level, many states have legalized its use for medicinal and/or recreational purposes. The rise in state legality of cannabis use has led to the increase of cannabis users, and health care providers need to be aware of the potential rise in cannabis use by […]

Independent Contractor or Employee: What's the Difference?

August 7, 2019

It’s a vexing question for practice owners: How do you classify a potential new dentist who is joining your practice? Is the dentist an independent contractor or an employee? The misclassification of an employee as an independent contractor can result in serious financial ramifications, including taxes, fines, and penalties from both state and federal agencies. […]

Casey Gocel and Panelists to Speak on DSOs at Greater New York Dental Meeting

August 22, 2023

Co-Chair of our National Dental Law Group team, Casey Gocel, Esq. will be speaking at Greater New York Dental Meeting – the largest dental meeting in the United States! Together with this “All-Star” panel (Benjamin Bush, Brian Houlahan and Justin Schafer), they will help the nation’s leading dental professionals better understand DSOs. This informative presentation […]

22 Attorneys Named to 2024 Best Lawyers List

August 17, 2023

Mandelbaum Barrett PC is proud to announce that 22 lawyers were recognized to the 2024 Best Lawyers list. At Mandelbaum Barrett PC, we have always strived for excellence and have consistently sought to uphold the highest standards of legal practice. This recognition serves as a reminder of our ongoing mission to provide unparalleled legal representation […]

CEO William S. Barrett Named to 2023 NJBIZ Law Power 50 List

July 24, 2023

Congratulations to our CEO William Barrett, Esq. for his recognition on the 2023 NJBIZ Law Power 50 list, honoring the 50 most influential men and women in New Jersey’s legal profession. Bill provides strategic counsel to businesses nationwide as well as plays a pivotal role in driving Mandelbaum Barrett PC’s ongoing growth and fostering innovation. […]

Insights from William Barrett: New York County Dental Society Article Explores Cybersecurity Risks in Dental Practices

June 22, 2023

Dental health professionals handle a vast amount of sensitive patient data, ranging from personal information to medical records. To protect themselves and their patients, it’s important for them to understand cybersecurity risks and take appropriate measures. Staying aware of the latest threats and trends is crucial for adequate protection. Learn about some of the ways […]

CEO William S. Barrett Named to ROI Influencers Power List – Law

February 13, 2023

Congratulations to MB CEO William Barrett on being named to the ROI NJ 2023 Influencers Power List! According to ROI-NJ, “with hundreds of firms around the state practicing in dozens of areas — we went searching for the top person at all the top firms.” Bill serves as not only our Chief Executive Officer, but […]

CEO and Co-Chair of the National Dental Law Group, William Barrett, Discussed “The Pros and Cons of Selling or Partnering with a DSO” in the Fall Edition of Dental Entrepreneur Media.

December 14, 2022

If you are a dentist who is considering selling your practice to a DSO or partnering with a DSO, please read pages 16-18 in the Dental Entrepreneur Media for the article, “The Pros and Cons of Selling or Partnering with a DSO,” written by our CEO and Co-Chair of the National Dental Law Group, William […]

William Barrett and Justin Wade Led an Interactive Discussion for Dentists at Fortune Management’s Fortune50 Conference

November 1, 2022

Last week, William Barrett and Justin Wade attended Fortune Management’s Fortune50 conference, where they led an exclusive group of dental professionals in an interactive discussion of the common legal mistakes that dentists make in transactions. However, this was no ordinary lecture. Doctors were given a fact pattern in advance and were prepared to discuss in a law school style setting the facts […]

William Barrett to Speak at Fortune Management Event for Dental Professionals Wishing to Grow their Business

October 25, 2022

William Barrett, our CEO and Co-chair of the National Dental Law Group, will be speaking at a momentous Fortune Management event. Leveraging the knowledge, expertise, and support of like-minded entrepreneurs and dentists, Fortune 50 members will participate in an exclusive group of dental professionals that wish to grow their businesses exponentially. Session: Advanced M&A Issue Spotting for […]

Mandelbaum Barrett PC is proud to announce 17 of our attorneys have been named to the Best Lawyers in America 2023 list.

August 18, 2022

15 years of recognition: Barry R. Mandelbaum, Steven Adler, Jeffrey M Rosenthal and Michael Saffer 10 years of recognition: Jeffrey Cappola, Gordon C. Duus, Arthur D. Grossman, Owen T. Hughes and Barry Schwartz William Barrett, David Carton, Damian Conforti, Rebecca Frino, Raj Gadhok, Martin D. Hauptman, Esq., Steven Holt and Lynne Strober *No aspect of this advertisement has been approved by the Supreme Court of New Jersey or the American […]

CEO William Barrett named to ROI-NJ’s Inaugural “Influencers in the Law” List

July 28, 2022

ROI-NJ has just announced its inaugural “Influencers in the Law” list and we are thrilled that CEO William Barrett has been named to this list. This list pulls together some of the best and brightest attorneys from business transactions to intellectual property disputes, HR issues to cyber concerns, health care challenges, and more throughout the […]

CEO William S. Barrett named to NJBIZ Power 50 in Law List for 2022

July 25, 2022

Congratulations to our CEO William Barrett, Esq. who has been named to the NJBIZ Power 50 in Law list for 2022. Bill not only serves as strategic counsel to businesses throughout the country, but he also leads Mandelbaum Barrett PC’s continued growth and innovation. He gives personal attention to not just his clients, but also […]

CEO William Barrett featured in Dental Practice Reporter article, “5 Ways To Keep Your Private Practice Competitive: The Trend Toward The DSO Business Model.”

May 27, 2022

The increasing expansion of dental support organizations (DSOs) has become a polarizing topic in the dental industry over the last several years—some professionals credit DSOs as being a useful tool in the practice of dentistry, while others blame the DSO business model for destroying dentistry as we know it. Despite this back and forth, the […]

CEO William Barrett recently appeared on Dental Business Radio with Patrick O’Rourke. 

May 20, 2022

They discussed considerations for dental practice owners who are considering selling their practice to a DSO or creating a DSO themselves. Bill and Patrick also discussed getting proper legal counsel, misclassification of independent contractors, practice brokers, partnerships, and much more. To listen to the recorded interview: https://lnkd.in/gkD4RiFs

Best-selling authors Fred Joyal and William Barrett, Esq. are pleased to present their recent webinar titled “Navigating the DSO Decision.”

May 5, 2022

This is your chance to gain an in-depth, unbiased understanding of the DSO landscape.  Watch the webinar here: https://bit.ly/3yl1MUb

Mandelbaum Barrett PC CEO and Best-Selling Author William Barrett Featured in ROI-NJ Article Discussing Corporate Dental Groups

April 7, 2022

Mandelbaum Barrett PC CEO and best-selling author William Barrett, Esq. was interviewed for the April 6th, 2022 issue of ROI-NJ discussing how more and more dental practices are joining corporate dentistry groups. "The consolidation of the dental specialty is happening at a rip-roaring pace right now," he said. "In the past week, I brought in six new transactions with doctors selling or partnering with dental support organizations, or DSOs, backed by private equity, as just one legal practitioner. We're a firm with a good reputation in the space, but that's still a remarkable number of transactions to have in a week."

Mandelbaum Barrett PC CEO and Best-Selling Author William Barrett Featured on Recent Becker's Healthcare Podcast

April 5, 2022

Mandelbaum Barrett PC CEO and Best-Selling Author William Barrett, Esq. was recently featured on a Becker's Hospital Review podcast. In the episode, Mr. Barrett discusses the reasons he began focusing on the legal representation of dentists and dental specialists in practice transitions and his book "Pain-Free Dental Deals: An Entrepreneurial Dentist's Guide to Buying, Selling, and Merging Practices."

Congratulations to Mandelbaum Barrett PC CEO Bill Barrett on being named a Guest of Honor at the Chabad Center of Northwest New Jersey's Founders Dinner

March 22, 2022

Congratulations to CEO William Barrett on being named as a guest of honor and receiving the Pillar of Kindness recognition for the Chabad Center of Northwest New Jersey's Founders Dinner. This year the Center is celebrating their 35th year of Igniting Souls with a gala event on May 2nd at The Crystal Plaza. Bill joins honorees Scott Weisberger and Todd Sawyer for this incredible event which helps support the Center and all of its good work.

William Barrett to present at the Greater Long Island Dental Meeting

March 14, 2022

Mandelbaum Barrett PC CEO and best-selling author William Barrett, Esq. will be joining fellow industry thought leaders, Michael Apalucci, Dr. Scott Firestone and Jarrett Mathews at the Greater Long Island Dental Meeting (GLIDM) on Tuesday, April 12, 2022 from 2pm to 5pm at the Hilton Hotel in Melville, NY. The presentation is titled "The Yin and Yang of Practice Transitions."

William Barrett Quoted in New Jersey Law Journal on Mandelbaum Barrett PC's Revenue Growth

November 9, 2020

William Barrett was quoted in the New Jersey Law Journal article, “NJ Top 40: What Does Law Firms’ 2019 Momentum Mean for 2020 Performance?” Accounting for the firm’s steep revenue growth in 2019 ($42 million versus $34.5 million in 2018), and the firm’s placement among New Jersey’s top 20 largest law firms, he noted that […]

Spring 2020 Veterinary Newsletter

May 29, 2020

Bill Barrett Interviewed by Locum Leaders on the Key Trends Affecting Dentist Jobs in 2020

December 5, 2019

Bill Barrett, Chair of the Firm's National Dental Law Center and co-author of "Buy Sell Merge: How to Navigate Successful Dental Practice Transitions for the Entrepreneurial Dentist" was recently interviewed by Locum Leaders on the key trends affecting dentist jobs in 2020. To read about what could potentially impact the field in the years ahead, click here.

Barrett Spoke at Greater New York Dental Society Annual Meeting on "Mergers, Acquisitions, Associateships and Transitions"

November 29, 2019

William Barrett and Casey Gocel Published an Article for Dental Practice Management on Doing Deals with DSO

November 18, 2019

Bill Barrett Presented at the New York County Dental Society Program on October 4

October 4, 2019

William Barrett, Esq. presented to dentists at the New York County Dental Society’s CE program on October 4th entitled, “Know Before You Sign: Associate Dental Agreements” where he helped young dentists and residents better understand dental contracts.

William Barrett Quoted in Retire Ahead on Selling Your Small Business for Retirement

September 9, 2019

William Barrett was quoted in Retire Ahead magazine on Selling Out: How to come out ahead as a small business owner who's ready to retire. Click here to read the full article (pg. 5).

Barrett Spoke at New York County Dental Society's "Career Advice After Dental School/Residency"

August 6, 2019

Barrett To Speak At New York County Dental Society's "Career Advice After Dental School/Residency"

July 17, 2019

CEO William S. Barrett will speak as part of a New York County Dental Society panel on "Career Advice After Dental School/Residency" on Tuesday, August 6, 2019. The program will begin at 6:30 p.m. and will address the following factors critical to landing a job and creating a successful career:

Barrett To Speak At Greater New York Dental Society Annual Meeting On "Mergers, Acquisitions, Associateships And Transitions"

July 17, 2019

Whether you are looking to become a practice owner, grow your existing practice through acquisition, or you are seeking the best exit strategy in your career, you need to understand the issues of practice transition from both perspectives. Learn about the current state of the market for mergers, acquisitions and sales of general dentistry and dental specialty practices and the business and legal pros, cons and considerations to navigate between practice purchase/sales vs. associate buy-in partnerships transactions.

Bill Barrett Spoke at the New York County Dental Society's Program on Associate Dental Contracts

October 5, 2018

William Barrett, Esq., CEO and Chair of the Firm's Professional Practice Transitions Group spoke on October 4th at the New York County Dental Society's program on Associate Dental Contracts where he shared with the crowd important tips that dentists should "know before they sign."

Bill Barrett Quoted In Dentists Money Digest on Importance of Understanding Employee Overtime Rules

August 21, 2018

William Barrett, CEO and Chair of Mandelbaum Barrett PC's Professional Practice Transitions Group was quoted in an article in Dentists Money Digest on the "Importance of Understanding Employee Overtime Rules."

Bill Barrett and Casey Gocel Authored an Article for DrBicuspid.com on "Independent Contractor or Employee: What's the Difference?"

August 7, 2018

Understanding the difference between an Independent Contractor and an Employee is a challenge many practice owners often grapple with. In this article from DrBicuspid.com, William Barrett, Esq. and Casey Gocel, Esq. LL.M. break it down to help avoid the serious financial ramifications of misclassification.

Barrett Authors Article for Dentistry IQ

June 12, 2018

William Barrett, CEO of Mandelbaum Barrett PC and the Firm's Professional Practice Transitions Chair recently authored an article for Dentistry IQ on guidelines dentists should be aware of when planning background checks for new employees.

CEO Bill Barrett talks with Howard Farran on Dentistry Uncensored Podcast about Professional Practice Transitions

May 14, 2018

Check out Mandelbaum Barrett PC CEO and Professional Practice Transitions Group Chair William Barrett, Esq. on the Dentaltown Podcast where he and host Howard Farran, DDS, MBA talk about practice transitions and what dentists need to know to time it right and what legal considerations they should be thinking about.

CEO Bill Barrett is interviewed on American Express' Open Forum on "Winning the Endgame: How to Create an Exit Strategy"

May 14, 2018

Bill Barrett was interviewed recently for the American Express Open Forum on "Winning the Endgame: How to Create an Exit Strategy." Check out what Bill and other experts have to say about the importance of having an exit strategy BEFORE you need one!

Bill Barrett Was Recently Interviewed by New Jersey Law Journal For Their "Leadership Profile" Series

April 23, 2018

Mandelbaum CEO William Barrett, Esq. was interviewed by the New Jersey Law Journal for their Firm Leaders profile series in April 2018

William Barrett to Speak at Fortune Management's Fortune 50 Advanced Training for the Dental CEO Event in California

August 8, 2017

Co-CEO and Chair of the Firm's Professional Practice Transitions and Business Law Departments, William Barrett, will speak at Fortune Management's Fortune 50 Advanced Training for the Dental CEO event in San Jose, California September 28-29! Attendees will learn about leadership development, acquisitions, business plan development, key strategy development and more.