Cassie’s practice primarily involves advising health care clients on transactional and regulatory matters, including serving as regulatory counsel on health care transactions and assisting clients in establishing and implementing MSO-PC arrangements. She frequently oversees the health care regulatory aspects of complex transactions in the health care industry, including recent private equity investments in pediatric, dental, ambulatory surgery, and addiction treatment providers. She has also served as regulatory counsel to various institutional lenders in financing transactions in connection with the acquisition of health and life science industry companies. Cassie regularly acts as a subject matter expert, advising clients on HIPAA/privacy compliance, telehealth and other digital health matters, corporate practice issues, professional and facility licensing, determinations of need/certificates of need, and Medicare and Medicaid compliance. Cassie also has experience advising non-profit organizations on matters related to formation and corporate governance.
Throughout her career, Cassie has worked with providers, payors, individual patients, and a range of investors in the health care space, so she understands the unique challenges facing clients in the ever-changing health care landscape. She enjoys working with interdisciplinary teams to come up with creative solutions to her clients’ problems.
Prior to joining Mintz, Cassie worked as in-house counsel at a national senior living company. There she advised the business on matters related to state and federal health care regulations, physician arrangements, reimbursement, fraud and abuse, and HIPAA/privacy. Cassie’s in-house experience informs current her practice, enabling her to anticipate and relate to clients’ legal and business needs.
A member of the firm’s Pro Bono Committee, Cassie is particularly passionate about addressing health disparities, focusing on increasing access to reproductive health care and behavioral health services, including substance use disorder treatment. She currently serves on the Board of the South Boston Collaborative Center, a substance abuse and mental health treatment center located in South Boston.
viewpoints
CMS releases Final Rule Overhauling Long-Term Care Facility Requirements
October 10, 2016 | Blog | By Lauren Moldawer, Cassandra Paolillo
News & Press
Mintz Advises Seven Starling on $8M Series A-Prime Financing
September 19, 2025
Mintz advised Seven Starling, a virtual health provider specializing in mental health care during fertility, pregnancy, postpartum, and early parenthood, on its $8M Series A-Prime financing, led by Rethink Impact.
173 Mintz Attorneys Across 53 Practice Areas Recognized by The Best Lawyers in America 2026
August 28, 2025
173 Mintz attorneys across 53 practice areas have been recognized by Best Lawyers® in the 2026 edition of The Best Lawyers in America©. Five Mintz attorneys received 2026 “Lawyer of the Year” awards, and 61 firm attorneys were included in the 2026 edition of Best Lawyers: Ones to Watch.
Mintz has earned top rankings in the 2025 edition of Legal 500 United States and Canada guides. The firm is recognized in 20 practice categories, and 78 of its attorneys are individually ranked in the guide, with several receiving recognition in more than one category. Additionally, two attorneys are featured in the "Hall of Fame," seven attorneys are named "Leading Lawyers," and five attorneys are recognized as a "Next Generation Lawyers."
Pratt's Privacy and Cybersecurity Report published an article by Privacy & Cybersecurity Practice Co-chair Scott Lashway, Special Counsel Matthew MK Stein, Of Counsel Cassandra Paolillo, and Associate Kayla LaRosa examining the differences between the New York legislature's version of Washington's My Health Data Act and the Washington law. The New York Health Information Privacy Act currently awaits Kathy Hochul’s signature.
Mintz is pleased to announce that 31 attorneys have been named Massachusetts Super Lawyers and 35 attorneys have been named Massachusetts Rising Stars for 2024.
The Best Lawyers in America 2025 Recognizes 184 Mintz Attorneys across 56 Practice Areas
August 15, 2024
187 Mintz attorneys have been recognized by Best Lawyers® in the 2025 edition of The Best Lawyers in America©. Notably, three Mintz attorneys received 2025 “Lawyer of the Year” awards, and 64 firm attorneys were included in the 2025 edition of Best Lawyers: Ones to Watch.
Mintz's Natalie Groot and Cassandra Paolillo Named Up & Coming Lawyers by Massachusetts Lawyers Weekly
March 18, 2024
Mintz is pleased to share that Member Natalie Groot and Of Counsel Cassandra Paolillo have been selected by Massachusetts Lawyers Weekly as 2024 Excellence in Law ‘Up & Coming Lawyer’ honorees.
Fifty-Nine Attorneys Recognized as 2023 Massachusetts Super Lawyers and Rising Stars
October 12, 2023
Mintz is pleased to announce that 32 attorneys have been named Massachusetts Super Lawyers and 27 attorneys have been named Massachusetts Rising Stars for 2023.
Mintz is pleased to announce that 120 firm attorneys have been recognized as leaders by Best Lawyers® in the 2024 edition of The Best Lawyers in America©.
35 Mintz attorneys have been named Massachusetts Super Lawyers and 25 Mintz attorneys have been named Massachusetts Rising Stars for 2022.
Potential Pitfalls of Telehealth Prescribing
July 29, 2022
podcasts
Health Law Diagnosed – Understanding the New Massachusetts Health Care Market Review Law
March 11, 2025 | Podcast | By Bridgette Keller, Deborah Daccord, Kate Stewart, Cassandra Paolillo
Host Bridgette Keller discusses the new Massachusetts Health Care Market Review Law and what this means for health care providers, investors, and other key stakeholders. She is joined by Member Deb Daccord, Of Counsel Cassie Paolillo, and Of Counsel Kate Stewart, who share their insights on the law’s far-reaching implications.
Health Law Diagnosed — Mintz Health Law Team: Reflecting on What We Are Grateful For
February 5, 2024 | Podcast | By Bridgette Keller
As the Mintz Health Law team welcomes the beginning of 2024, many of its members take a moment to reflect on the exciting growth of the Health Law Practice, opportunities to partner with clients on complex legal issues, and the celebration of numerous milestones.
Mintz Health Law: What We Are Grateful For
January 11, 2023 | Podcast | By Bridgette Keller
Bridgette Keller speaks with the Mintz Health Law team about what they are grateful for as they look back on a year of client service, mentorship, and working together as a team.
Health Law Diagnosed – Digital Health During the PHE and Beyond: Leveraging Telehealth to Address Disparities in Access to Care
June 14, 2022 | Podcast | By Bridgette Keller, Cassandra Paolillo
Telehealth has the potential to counteract historical disparities in access to health care. Listen to hear how Andy Ward, Director of the South Boston Collaborative Center, and Kate Steinle, Chief Clinical Officer of Folx Health, are leveraging telehealth to serve their communities.
Health Law Diagnosed: Transactions Part 2: Health Regulatory Diligence and How to Prepare for a Sell-Side Transaction
March 24, 2022 | Podcast | By Tara E. Dwyer, Xavier Hardy, Bridgette Keller, Lauren Moldawer, Cassandra Paolillo, Kate Stewart
Health regulatory diligence has the ability to make or break a deal. Listen to hear about our team’s firsthand experience in the importance of conducting health regulatory diligence and best practices in preparing for a sell-side transaction.
Health Law Diagnosed — Transactions Part 1: Regulatory Trends in Recent Health Care Transactions
March 3, 2022 | Podcast | By Xavier Hardy, Bridgette Keller, Lauren Moldawer, Cassandra Paolillo, Kate Stewart
Health Law Diagnosed — Telehealth Transformation: Where We Are and Where We’re Headed
April 9, 2021 | Podcast | By Ellen Janos, Cassandra Paolillo
Events & Speaking
Tracking Technologies in Health Care
Women Business Leaders of the U.S. Health Care Industry Foundation
Online Event
Telehealth: What's Next?
Women Business Leaders of the U.S. Health Care Industry Foundation (WBL) Event
Online Event
Recognition & Awards
Best Lawyers in America: Ones to Watch - Health Care Law (2024 - 2026)
Recognized by The Legal 500 United States for Healthcare: Service Providers (2025)
Massachusetts Super Lawyers Rising Stars: Health Care (2022 – 2024)
Massachusetts Lawyers Weekly: Up & Coming Lawyer (2024)
Involvement
- Member, American Health Law Association
- Member, Boston Bar Association
- Board Member, South Boston Collaborative Center
Recent Insights
