One Beacon Street
Suite 1320
Boston, MA 02108

T 617.720.5090
F 617.720.5092


One Cedar Street
Suite 300
Providence, RI 02903
T 401.454.0400
F 401.454.0404

Callan Stein

Practice Area: Litigation , Corporate

Callan Stein is a partner in Barrett & Singal’s Litigation group, where he focuses on white-collar criminal defense, corporate and commercial civil litigation, healthcare litigation, professional licensing matters, and research misconduct cases. He has practiced in federal, Massachusetts, and Rhode Island courts, and before state and federal governmental administrative agencies.

In his white-collar criminal practice, Cal regularly defends corporations, small businesses, corporate officers and directors, governmental and public employees, and other individuals accused of, or being investigated for, alleged white-collar crimes including state and federal False Claims Act violations, healthcare fraud and abuse, securities fraud, mail fraud and wire fraud, racketeering and RICO violations, and violations of food and drug laws. Cal defends companies and individuals during all stages of the criminal process, and has experience responding to government requests for information that typically signal the existence of a potential investigation such as HIPAA Subpoenas, Administrative Subpoenas, Civil Investigative Demands (CID), Grand Jury Subpoenas, or even Search Warrants.

In his commercial civil litigation practice Cal represents small and large businesses in general corporate matters and in active litigation involving contract disputes, business torts, alleged violations of ch. 93A or other consumer protection/unfair competition laws, regulatory violations, and employment cases involving wrongful discharge, retaliation, discrimination, and violations of state and federal whistleblower laws. Cal also has experience providing general corporate counsel services to small and large companies, and working with businesses to create and implement policies and procedures to mitigate corporate liability and avoid litigation.

Since 2014, Cal has headed up the firm’s E-Discovery team. As head of the E-Discovery team, Cal advises clients on thorough and proper methods for preserving, searching, and collecting documents and electronically stored information (including emails) that are relevant to lawsuits and/or government investigations, and likewise works with clients during the discovery process (in active criminal and civil cases) to minimize costs and maximize efficiency by using cutting edge document management software and document review techniques, including technology assisted review (TAR) such as predictive coding, email threading, and topic clustering.

Much of Cal’s white-collar criminal and commercial civil litigation practices focus on the growing area of healthcare litigation. He represents healthcare providers charged with, or being investigated for, criminal and civil healthcare fraud and abuse including violations of the False Claims ActAnti-Kickback Statutes, HIPAA, and the Stark Act, as well as those accused of Medicare and Medicaid fraud such as up-coding, unbundling, rendering medically unnecessary services, or other billing irregularities. Cal also represents healthcare facilities, providers, practices, and medical staffs involved in third-party payor disputes, utilization review management issues, and medical staff credentialing issues. As part of his healthcare litigation practice, Cal has also represented healthcare facilities and other healthcare employers in employment-related litigation alleging violations of state and federal healthcare whistleblower laws, credentialing disputes, and physician disciplinary matters.

Cal also represents physicians, dentists, physician assistants, nurses, attorneys, CPAs, and other licensed professionals facing disciplinary or other charges before professional licensing boards, as well as scientists, medical researchers, and other academics in research misconduct cases.

Awards & recognitions

Massachusetts Super Lawyers Rising Star, 2014-2017
Massachusetts Lawyers Weekly Up & Coming Attorney, 2013


Boston University School of Law, J.D., 2007
Brandeis University, B.A., cum laude, with honors, 2004

Court / Bar Admissions

Rhode Island
U.S. District Court for the District of Massachusetts
First Circuit Court of Appeals

Publications & Presentations



Boston Bar Association
Massachusetts Bar Association

Service Areas

White-Collar Criminal; Civil Litigation; Healthcare Litigation; Business Torts; Contract Disputes; Commercial Litigation; Unfair and Deceptive Trade Practices (Ch. 93A); Pharma/Healthcare Fraud; Medicare/Medicaid Fraud; Mail and Wire Fraud; Employment Disputes/Discrimination/Retaliation; Whistleblower Litigation; Professional Licensing and Disciplinary; Research Misconduct; Public/Quasi-Public Authority Representation; Securities/Banking/Mortgage/Tax Fraud; Public Corruption; Environmental Violations; Corporate; Responding to Subpoenas/CIDs


Corporations; Small Businesses; Startups; Healthcare Providers; Hospitals/Nursing Homes/Medical Practices; Physicians/Dentists/Physician Assistants/Nurses; Medical Device; Managed Care; Professional Services (Attorneys, CPAs, Engineers); Staffing Agencies; Government Contractors/Public Officials; Scientists/Medical Researchers; Biomedical/Life Sciences; Non-Profit; Education; Financial Services; Pharmacies/Pharmacists; Public Authorities; Quasi-Public Agencies; Retail; Securities; Technology

Civic & Charitable Activities

Cal is involved with the Boston University School of Law Career Development Office mentoring program and enjoys volunteering as a judge for several of the school’s moot court programs. He also previously coached high school football and baseball in Brookline, MA.

Off the Record...

When Cal was 15 he landed his first job selling sneakers at City Sports. He is still in touch with his manager today.

  • The Super Lawyers list is issued by Thomson Reuters. A description of the selection methodology can be found at here. No aspect of this advertisement has been approved by the Supreme Judicial Court of Massachusetts.

representative matters

  • Secured verdicts of not guilty on all twenty-five charges of second-degree murder against Barry Cadden in the nationally-covered New England Compounding Center criminal case arising out of the 2012 meningitis outbreak.
  • Obtained summary judgment in favor of a quasi-public organization and a former director in a multi-million dollar contract and business tort lawsuit brought by a former vendor.
  • Represented owner and President of a technology company during a federal criminal investigation into export violations and government contract fraud. Ultimately succeeded in persuading federal prosecutors not to bring criminal charges against the individual or his company.
  • Obtained summary judgment in favor of a hospital and the chief of its medical staff in a lawsuit brought by a previously-dismissed physician alleging improper termination.
  • Won a landmark federal lawsuit against the U.S. Government (HHS) to overturn a debarment order based on findings of research misconduct and remand the case for the first administrative hearing on research misconduct charges since 2005.
  • Won motion to dismiss a breach of privacy lawsuit brought by a patient against her treating hospital for allegedly disseminating confidential medical information.
  • Obtained dismissal of a high-profile civil lawsuit brought against a former high-ranking state employee alleging public corruption and political affiliation discrimination.
  • Part of a trial team that won a favorable verdict for a multi-million dollar corporation and its chairman and CEO against a former employee who alleged he was entitled to a stake in the business worth tens of millions of dollars.
  • Successfully defended a company providing utilization review services to a health insurance plan against a lawsuit alleging the improper denial of members claims as not medically necessary. Obtained a non-criminal resolution of state dental insurance fraud charges brought against a dentist and her dental practice by the state Attorney General’s Office.
  • Successfully defended a hospital and several senior employees against a former employee’s federal whistleblower and wrongful discharge allegations by reaching a favorable negotiated resolution.
  • Obtained a civil settlement in excess of one million dollars for a commercial landlord in a breach of lease lawsuit.
  • Represented numerous researchers accused of research misconduct before institutional inquiries and investigations, and before the federal Office of Research Integrity.
  • Recovered damages on behalf of a hospital medical group against a former member-physician who breached his employment agreement.
  • Performed general corporate legal services for several small business including drafting Shareholder/Operating Agreements, drafting employee handbooks developing other policies, advising human resources personnel on best practices, and representing the businesses before various state agencies.
  • Obtained dismissal of a breach of contract lawsuit brought by a doctor against his former medical practice .
  • Successfully defended a senior employee of an investment company against SEC allegations that he violated the Securities Act and the Exchange Act by engaging in a scheme to defraud investors, and further represented that individual in subsequent related state court civil proceedings.
  • Negotiated a non-criminal disposition for a former municipal employee charged with multiple criminal violations of state environmental regulations by the state Attorney General’s Office.
  • Obtained dismissal of a civil class action suit against a former director of a large corporation brought by a class of former employees.



bio pdf

“Thank you for giving me my life back.”
–Acquitted client

Callan Stein

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