Dennis J. Alessi prides himself on anticipating the risks and opportunities of his employer and healthcare clients, while providing highly practical compliance counsel that moves the needle forward.

Dennis has more than 35 years of experience helping businesses manage their workforces, maintain compliance with federal and state employment laws, and address employee disputes and regulatory investigations. He also develops, implements and updates employment policies, handbooks, policies and forms, in addition to conducting educational seminars for managers on a wide range of issues, including ways to mitigate risk and manage disputes, in order to avoid litigation.

When litigation does arise, Dennis defends employers before the New Jersey Division on Civil Rights, the Equal Employment Opportunity Commission, and other federal and state employment regulatory agencies. He also regularly represents employers in wage and hour, discrimination, harassment, wrongful termination and whistleblower cases in New Jersey and New York’s federal and state courts, and in administrative law hearings and arbitrations.


A significant part of Dennis’ practice is devoted to counseling healthcare providers, professionals and businesses, including physicians, dentists, management and billing service providers, third party administrators, group purchasing organizations, labs and surgical centers. Leveraging more than two decades of industry experience, and a graduate certificate in healthcare law compliance, Dennis helps clients establish, structure and license their businesses, strike joint ventures and other professional arrangements, negotiate leasing and exclusive service agreements, and comply with the industry’s evolving regulations.

In addition, Dennis litigates and addresses complex healthcare matters in state and federal courts, and before administrative agencies, licensing boards and hospital fair hearing committees. The range of concerns he frequently deals with includes disputes stemming from medical group dissolutions, physician shareholder dismissals and employee lawsuits, as well as defending clients against allegations of insurance fraud, false claims and kickback schemes.

  • Sections American Bar Association, Health and Hospital Section
  • New Jersey State Bar, Health and Hospital Law and Employment Law

  • District of Columbia
  • State of New Jersey
  • State of New York
  • United States District Court for the District of New Jersey, the Southern and Eastern Districts of New York, and the District of Columbia
  • United States Court of Appeals for the Second and Third Circuits

  • George Washington University School of Graduate Studies, Certificate; Healthcare Law Compliance
  • New York University School of Law, LL.M, with honors
  • New England School of Law, J.D. College of William and Mary B.A., Political Science

Navigating Dental Spa Regulations Across the United States

May 9, 2024

The rise of dental spas, offering both dental care and  injections of Botox, Juvéderm, and Restylane, for purely aesthetic, cosmetic purposes unrelated to any dental treatment or care, presents a complex legal landscape that varies significantly from state to state. This article explores examples of this diversity from a number of states across the country […]

FTC Rule Banning Non-Competes: What It’s All About!

April 25, 2024

On April 23, 2024, the FTC finalized a rule prohibiting non-compete agreements for most employees. This article outlines the key aspects of the rule, explains employer compliance requirements, and offers advice for navigating uncertainties arising from litigation challenging the rule.

Veterinary Law Newsletter: Volume 26

March 4, 2024

Exciting updates from the National Veterinary Law Group at Mandelbaum Barrett PC! Our newest newsletter has arrived, brimming with invaluable insights tailored for the veterinary industry. Discover informative articles addressing crucial topics for practice owners in 2024, from profit interests to associate contracts and telemedicine. We’re also thrilled to showcase some remarkable partners, including VetInsure, […]

Navigating Dental Spa Ownership and Operation in New Jersey

January 25, 2024

Dentists in metropolitan areas advertise cosmetic procedures like teeth whitening and Botox injections. While some claim legality based on vague interpretations of regulations, New Jersey law strictly defines dentistry as tooth and oral care. Despite regulations allowing injectables in dental settings, courts clarify they're only for dental treatment, not cosmetics. Regulatory compliance is crucial for dental spas entering the lucrative cosmetic market. Our legal experts specialize in navigating dental law to ensure compliance and success.

Navigating ADA Compliance Challenges in the Healthcare Sector

January 25, 2024

The Americans with Disabilities Act (“ADA”) is the primary federal statute which prohibits discrimination in employment based upon an individual’s physical or mental disabilities. State laws which prohibit disability discrimination in employment have similar prohibitions on such discrimination and in some respects compliance with the State law is even more demanding on employers than ADA […]

Effective HR Management Documentation for Dental Practices

January 23, 2024

Course Description: In this informative presentation, Dennis Alessi and Brent Pohlman, Partners at Mandelbaum Barrett PC, will provide valuable insights into creating and implementing effective policies and procedures. Discover how a well-crafted policy manual serves as a shield, providing a strong defense against potential legal issues. Explore strategies to proactively address claims related to discrimination, […]

The No Surprises Act: A Look at What Dentists Need to Know

December 8, 2023

The Federal No Surprises Act (“NSA”) was signed into law on December 27, 2020, as part of the Consolidated Appropriations Act of 2021. Since its enactment, the NSA has been supplemented on two occasions by regulations which were issued jointly by the U.S. Department of Labor, U.S. Department of Health and Human Services, and Internal […]

Avoiding Pitfalls in the Hiring Process

November 21, 2023

In an enlightening presentation, Partners Dennis Alessi and Brent Pohlman from Mandelbaum Barrett PC share crucial insights on crafting robust policies. Uncover the power of a well-designed policy manual as a legal defense against issues. Gain strategies to preemptively handle discrimination, harassment, and retaliation claims. Explore key elements for efficient HR document management. Key takeaways include mastering employee file management, onboarding, performance evaluations, disciplinary record upkeep, navigating payroll documentation, and safeguarding employee access to records and policy manuals. Enhance your HR documents for streamlined management.

The Inland Flood Protection Rule

September 29, 2023

On July 17, 2023, the NJDEP adopted changes to its Stormwater Management (SWM) rules and Flood Hazard Area Control Act (FHACA) rules, labelled the Inland Flood Protection Rule. These changes are part of a broader initiative of the state to address climate impacts, NJ Protecting Against Climate Threats (NJ PACT), including adjusting flooding standards to confront recent extreme rainfall events and anticipated future rainfall up until 2100.

Dennis Alessi, Esq. authors article for Physicians Practice titled “Privacy and ADA compliance for health care organizations”

March 13, 2024

The Americans with Disabilities Act (ADA) and state laws prohibit employment discrimination based on physical or mental disabilities, requiring compliance from all employers. Healthcare employers face additional challenges due to specific industry restrictions and privacy protections. Discover the intricacies of ADA compliance in healthcare employment with Mandelbaum Barrett PC’s Healthcare and Employment Law Co-Chair, Dennis […]

Peter Tanella, Esq. and Dennis Alessi, Esq. Co-Author Article on Telemedicine in Today’s Veterinary Business

February 1, 2024

Exciting News in Veterinary Care! The future of pet healthcare is here, and it’s going digital! Veterinary telemedicine is on the brink of explosive growth, but the big question is, are our current regulations up to the task of ensuring top-notch pet care and wider access? In the new Today’s Veterinary Business issue out today, […]

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 […]

Peter Tanella and Dennis Alessi to Present at WVC 2023

January 31, 2023

The National Veterinary Law Group at Mandelbaum Barrett PC Chair Peter Tanella, Esq. and Partner Dennis J. Alessi, Esq. will be giving 2 presentations at the upcoming WVC Conference in Las Vegas on February 21st. Their first session will be “Everything You Wanted to Know About MSOs: And Why Veterinarians Should Establish Their Own” followed by “Non-Traditional Methods for […]

Dennis J. Alessi Answers Reader’s Question for Newsweek Magazine.

January 9, 2023

“I’m more qualified than my co-workers, but they earn more – What should I do” asked a Newsweek reader recently and Mandelbaum Barrett PC Employment Law attorney Dennis J. Alessi, Esq. weighed in. In the article, Alessi talks about wage increase promises being considered “verbal agreements” that may be enforceable. Read full article here.

Dennis J. Alessi interviewed by Newsweek Regarding Overtime and Sick Leave on Trending Story

December 12, 2022

Dennis J. Alessi recently spoke with Newsweek to weigh in on a trending story about an employee who took sick leave to go on holiday for their mental health.  The worker, who received a sick note from their doctor, got six weeks off work, and booked a holiday during this time says that their boss wasn’t […]

Peter Tanella, Esq. and Dennis Alessi, Esq. Co-Author Article in Today's Veterinary Business Titled "Fair Share"

April 12, 2022

Peter Tanella, Esq., Chair of the National Veterinary Law Group at Mandelbaum Barrett PC and Partner Dennis Alessi, Esq. have co-authored an article in the April/May issue of Today's Veterinary Business titled "Fair Share." The article is featured in Mr. Tanella's regular column called "Legal Lingo" and discusses how granting equity interest in a hospital is a great way to beef up employee compensation and enhance loyalty.

Peter Tanella and Dennis Alessi to present at the VHMA 2022 Virtual Legal Symposium

April 7, 2022

National Veterinary Law Group at Mandelbaum Barrett PC Chair, Peter Tanella. Esq. and Partner Dennis Alessi, Esq. will be giving two presentations at the VHMA (Veterinary Hospital Managers Association) 2022 Virtual Legal Symposium on April 7th, 2022 from 1pm to 4:15pm ET. Topics include: Incentivizing Employees with Equity Interest - New Opportunities in Non-Traditional Methods Everything You Wanted to Know About Management Services Organizations (MSO) (And why veterinary professionals should establish their own)

Winter 2021 Veterinary Newsletter

February 15, 2021

Spring 2020 Veterinary Newsletter

May 29, 2020

Mandelbaum Barrett PC to Host Complimentary Webinars on COVID-19's Impact on Businesses and Healthcare Providers

March 19, 2020

Please join us for two complimentary webinars on employment and operational issues raised by the spread of COVID-19, led by Steven I. Adler, Mohamed H. Nabulsi and Dennis J. Alessi. For more information and to register, click here.

Dennis Alessi and Raj Gadhok Presented at the New York County Dental Society

October 16, 2019

Mandelbaum Barrett PC attorneys Dennis J. Alessi, Esq. and Raj Gadhok teamed up with Cristina L. Amyot, MHRM, SHRM-SCP, SPHR of EnformHR, LLC to present a 3 -hour CE course to dentists at the New York County Dental Society’s upcoming program on New York’s new anti-harassment law.

Dennis Alessi Interviewed for ROI-NJ on the Frequency of Healthcare Regulation Changes

April 8, 2019

Dennis J. Alessi, Esq., Co-Chair of Mandelbaum Barrett PC's Healthcare and Employment Law Practice Groups, was recently interviewed for an ROI-NJ piece on the frequency of healthcare regulation changes and the effect that it has on physician and practice group compliance. Read the article here.

Dennis Alessi and Raj Gadhok to Present at the New York County Dental Society

October 29, 2018

Mandelbaum Barrett PC attorneys Dennis J. Alessi, Esq. and Raj Gadhok are teaming up with Cristina L. Amyot, MHRM, SHRM-SCP, SPHR of EnformHR, LLC to present a 3 -hour CE course to dentists at the New York County Dental Society's upcoming program on New York's new anti-harassment law. Click here to learn more or register.

Dennis Alessi Published an Article in Medical Economics on "Bringing Value-Based Compensation To Your Medical Practice"

October 9, 2018

Dennis J. Alessi, Esq., Member and Co-Chair of both the Healthcare Law and Labor and Employment Law Practice Groups, recently authored an article for Medical Economics on "Bringing value-based compensation to your medical practice." Click here to read the full article.

Dennis Alessi Comments on Recent Events at Jenkinson's Aquarium in the Asbury Park Press

August 14, 2018

Employment Law Co-Chair Dennis J. Alessi, Esq. comments in the Asbury Park Press today on the recent events at Jenkinson's Aquarium and cautions employers to properly train their staff before an incident, not wait until one occurs! If you have questions about employee training programs and ensuring you are in compliance with employment laws, please contact us and our Employment law team can help.

Dennis Alessi Interviewed on NJ 101.5 Employment Law Segment on "Working From Home"

March 22, 2018

Dennis J. Alessi, Member and Co-Chair of the Firm's Labor & Employment Law Practice Group was interviewed on Nj 101.5 for a segment on issues arising when employees "work from home"

Dennis Alessi Quoted in January 2018 Healthcare Risk Management Magazine on "Communication-and-Resolution Programs"

January 16, 2018

Dennis J. Alessi, Esq., Member and Co-Chair of the Firm's Healthcare Law and Employment & Labor Practice Groups, was quoted in the January issue of Healthcare Risk Management Magazine. The article discusses Communication-and-Resolution Programs for hospitals and health systems and improvements that can be made.

Dennis Alessi Authors Medical Economics Article on "How to Express Sympathy Without Receiving a Malpractice Law Suit"

October 31, 2017

Dennis J. Alessi, Esq., Member and Co-Chair of both the Healthcare Law and Employment Law Practice Groups at Mandelbaum Barrett PC, recently authored an article for Medical Economics on "How to Express Sympathy Without Receiving a Malpractice Law Suit," a topic that has recently received notable press.

Dennis Alessi Interviewed in New Jersey Business September 2017 Issue on "Handling Business Closings and Layoffs"

September 12, 2017

Dennis J. Alessi, Esq., Member and Co-Chair of the Firm's Employment Law and Healthcare Law Practice Groups was recently interviewed by New Jersey Monthly Magazine for their September 2017 issue on "Handling Business Closings and Layoffs." Read what Dennis had to say on the topic here:

Dennis Alessi to Present "Ethics & Recordkeeping" CEU Program August 18, 2017

August 1, 2017

It's not too late to register for the Institute for Continuing Education and Dental Studies Institute's "Ethics & Recordkeeping" course presented by Mandelbaum Barrett PC Member and Healthcare Department Co-Chair Dennis J. Alessi, Esq.! New Jersey chiropractors, athletic trainers, massage therapists, dentists and other dental professionals will receive 2CEUs for attendance! You can register by phone at 973-808-1666 or

Dennis Alessi Authors Article on “The Good, The Bad, and The Ugly of the AHCA”

April 4, 2017

All of the mass media is focusing on the same aspects of the American Health Care Act (AHCA). This article written by Dennis Alessi focuses on a few of those aspects which are not being reported in the media, but which are of significant importance