Charles B. Oppenheim

Health care organizations and hospital systems across the United States turn to Charles Oppenheim when issues involving Stark Law, anti-kickback statutes, and fraud and abuse threaten their operations, reputations, and finances. Recognized throughout the industry and by his peers as one of the nation’s leading Stark Law experts, Charles has been involved in some of the most complex and consequential cases in this area of the law. 

Charles co-authored the 2026 American Health Lawyers Association Monograph on Stark Law, the eighth edition of a treatise he first wrote in 1998, which publication was cited by the Fourth Circuit Court of Appeals in United States ex rel. Drakeford v. Tuomey, No. 13-2219, 2015 U.S. App. LEXIS 11460 (4th Cir. July 2, 2015).  The depth and breadth of his knowledge form the foundation of a singular practice that protects his clients’ interests when threats arise under one of the most complex legal and regulatory schemes in health care. Colleagues and courts alike rely on Charles’ insights about Stark Law and anti-kickback matters contained in his many publications on the subject and in the expert testimony he is often called upon to provide in civil and criminal proceedings. 

Taking a practical, holistic approach when counseling clients, Charles focuses not only on addressing the issue at hand but also on putting the programs and structures in place that can help avoid future exposure and compliance concerns. He provides clear analysis of the applicable law and facts, and develops multiple options designed to maximize the likelihood of a favorable outcome. In addition to creating and implementing robust compliance programs, Charles assists with internal investigations, responds to government enforcement actions, and negotiates settlements for health care providers throughout the industry.   

Ranked by Chambers USA as a top California health care attorney, Charles has been described as “clearly a regulatory expert, with a very strong working knowledge of the landscape.” A client said, “He is a great expert in Stark Law” and ” … very responsive and knowledgeable. He gives very thought-out advice and has a very good feel for what the market practices are.” Another client hailed him as “a premier expert.” 

Charles’ practice also includes assisting clients with transactional, operational, and regulatory health care issues, including mergers and acquisitions, affiliations, joint ventures, and the formation of integrated delivery systems, including 1206(l) medical foundations. He has substantial experience in healthcare gainsharing, pay-for-performance, and clinical co-management agreements, and counsels managed care entities and ACOs, representing both health plans and providers in a variety of transactional and regulatory matters.

Representative Experience

• Served as outside transactional and healthcare legal counsel for North America’s largest tattoo removal business with over 40 studios and plans for further expansion in the wake of a $50 million private equity investment. Established its first tattoo removal and related management services agreement in North Carolina and represented the client in its acquisition of another tattoo removal business and associated management services agreement in Southern California. 
• Served as special outside healthcare legal counsel to a technology-driven national physician enablement company in its October 2021 affiliation with one of the Greater San Francisco Bay Area’s leading healthcare specialty groups, caring for patients at over 125 locations with more than 400 providers spanning 42 specialties. 
• Represented a major California medical center in a joint venture transaction with a Pennsylvania hospital and rehabilitation center operator to jointly manage 27 outpatient physical therapy clinics in the Los Angeles metropolitan area. 
• Served as California healthcare regulatory counsel to a Professional Medical Corporation in connection with a $545 million multistep transaction designed to more fully integrate the financial results of the client into the financial results attributable to a publicly-traded health management company, consistent with California’s restrictions on the corporate practice of medicine and fee-splitting.
• Served as outside legal counsel representing a leading nonprofit health system in Orange County and Los Angeles County that includes four hospitals, two medical groups, imaging centers, surgical centers, and more, in its joint venture partnership with a leading operator of nearly 200 physical therapy clinics to operate 17 community-based, full-service physical therapy centers in Southern California. 
• Helped several different clients (a hospital system, a medical practice, and a long-term care provider) create their own value-based enterprises and structured their innovative value-based arrangements to advance their goals of increasing access to and quality of care while controlling healthcare costs. These are among the first value-based enterprises and value-based arrangements that were established following the 2021 Stark law exceptions and anti-kickback statute safe harbors.