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DOJ v. OhioHealth Confirms Antitrust Enforcers’ Continued Focus on Health Care Markets

By Stefan M. Meisner, Donna Reuter, Connor Ahearn, Lauren Fleming & Daniel Leff on February 24, 2026
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On February 20, 2026, the Department of Justice’s Antitrust Division (DOJ) and Ohio Attorney General (Ohio AG) sued OhioHealth Corporation (OhioHealth), alleging that OhioHealth had unlawfully restrained trade in the market for general acute care inpatient hospital services in violation of the Sherman Act and Ohio’s antitrust statute. The action is further evidence that antitrust enforcers are highly focused on healthcare markets. Similarly, the Ohio AG’s participation demonstrates that state attorneys general are continuing to focus on antitrust enforcement, particularly in inherently local markets like health care. Click here to continue reading the full version of this alert.

Photo of Stefan M. Meisner Stefan M. Meisner

Over the past two decades, when companies have faced difficult global cartel investigations, United States Department of Justice antitrust investigations, antitrust class actions, and complex antitrust cases at the intersection of antitrust and patent law, Stefan M. Meisner has guided clients through their

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Over the past two decades, when companies have faced difficult global cartel investigations, United States Department of Justice antitrust investigations, antitrust class actions, and complex antitrust cases at the intersection of antitrust and patent law, Stefan M. Meisner has guided clients through their most challenging legal issues. In all these situations, Stefan has assisted clients in developing clear strategies with practical steps to ensure clients achieve results consistent with their priorities.

Stefan serves clients in a variety of industries, including heavy manufacturing, health care, consumer products, defense and aerospace, high tech, semiconductors, hospitals, alcoholic beverages, steel, mining, and aggregates.

Stefan has extensive experience practicing before the DOJ and the Federal Trade Commission in a variety of criminal, civil, and merger investigations. In addition, he has managed matters before international agencies, such as the European Commission, the Canadian Competition Bureau, the South African Competition Tribunal, the Japan Fair Trade Commission, Brazil’s Administrative Council for Economic Defense, and others. Stefan has coordinated the global strategy for clients defending multijurisdictional cartel investigations.

Stefan has extensive experience defending clients in private civil litigation as well, representing them in multidistrict litigation in antitrust class action matters at trial and appellate courts throughout the United States. He also represents clients defending antitrust and competition cases brought by competitors and other individual plaintiffs.

Applying his understanding of clients’ business and legal priorities, Stefan also provides tailored compliance counseling and helps clients proactively address potential risk areas when designing comprehensive compliance programs.

To develop efficient and effective solutions for businesses facing issues with electronic discovery and the management of electronically stored information, Stefan advises clients on e-discovery issues in the litigation and regulatory arenas. He counsels clients on developing effective strategies for managing electronic records in light of evolving standards on the preservation and production of electronic documents and data under the U.S. Federal Rules of Civil Procedure. Stefan also has extensive experience with investigations that involve forensic examination of electronic media and data.

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Photo of Donna Reuter Donna Reuter

Leveraging her experiences as a practitioner in the healthcare industry, Donna capably serves clients with her industry experience and her commitment to achieving client goals.

Donna is a healthcare associate in the Washington D.C. office, and her practice focuses on serving healthcare payer,

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Leveraging her experiences as a practitioner in the healthcare industry, Donna capably serves clients with her industry experience and her commitment to achieving client goals.

Donna is a healthcare associate in the Washington D.C. office, and her practice focuses on serving healthcare payer, provider, association, and industry clients in a broad array of legal matters spanning both litigation and regulatory compliance. She has previously worked on a variety of disputes involving areas of ERISA; medical malpractice; COVID-19; fraud, waste and abuse; intellectual property; and more.

Donna draws from her prior career as a pharmacist to inform her practice of the law: as a pharmacy manager for a major retail chain, and later as a clinical review pharmacist for a nationwide pharmacy benefit manager in Minnesota. She understands claims adjudication and billing processes, the pharmacy distribution chain, formulary management and utilization review processes, controlled substances laws, and pharmaceutical and healthcare adjacent areas.

In addition to her dedication to pro bono work, Donna enjoys mentoring, and is co-chair of the Minnesota Chapter of the Federal Bar Association’s quarterly newsletter, Bar Talk.

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Photo of Lauren Fleming Lauren Fleming
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Photo of Daniel Leff Daniel Leff

Daniel Leff is an antitrust litigator, trial lawyer, and strategic advisor. As a former state assistant attorney general, he draws on his experience litigating complex, high-profile antitrust cases for clients involved in or anticipating litigation as both plaintiffs and defendants. Dan also counsels

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Daniel Leff is an antitrust litigator, trial lawyer, and strategic advisor. As a former state assistant attorney general, he draws on his experience litigating complex, high-profile antitrust cases for clients involved in or anticipating litigation as both plaintiffs and defendants. Dan also counsels and advocates for companies seeking antitrust regulatory approval for mergers, acquisitions, and innovative business deals.

Dan joined Crowell from the Massachusetts Attorney General’s Office (AGO), where he served in the Office’s Antitrust Division. In that role, he worked hand-in-hand with enforcers from the U.S. Department of Justice (DOJ), the Federal Trade Commission (FTC), and the attorney general offices of nearly every U.S. state and territory to investigate and litigate merger, monopolization, and cartel matters.

His work with the AGO included successfully trying merger and Sherman Act § 1 cases in federal court. He was also a lead member of a plaintiff group comprising nearly every state attorney general office in the country in a large pharmaceutical price-fixing multidistrict litigation (MDL).

Dan also investigated, litigated, and settled numerous competition matters in industries including telecommunications, transportation, energy, agricultural products, healthcare, and pharmaceuticals. Clients benefit from Dan’s experience in the Sherman, Clayton, and FTC acts and numerous state antitrust and consumer protection statutes, as well as his familiarity with the perspectives of state and federal enforcers across the country.

Dan began his career at Crowell, where he represented clients facing federal and state antitrust, consumer protection, and environmental scrutiny, primarily in the telecommunications and energy industries. He also previously worked for an international law firm in Boston, representing pharmaceutical and medical device companies facing federal civil and criminal investigations.

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  • Posted in:
    Antitrust, Competition and Trade, Health Care and Life Sciences
  • Blog:
    State AG Blog
  • Organization:
    Crowell & Moring LLP
  • Article: View Original Source

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