Claire Marblestone
Partner
Claire Marblestone鈥檚 practice focuses on transactional and health care regulatory matters, with an emphasis on data privacy, corporate practice of medicine, health care mergers and acquisitions, and joint ventures. She聽advises hospitals, health systems, physician groups, digital health providers, and health care businesses on a range of regulatory and compliance issues. Claire also provides regulatory and transactional counsel to companies specializing in women鈥檚 health care.
Claire has been recognized by聽Chambers USA: America鈥檚 Leading Business Lawyers:
“Claire is very knowledgeable and client focused. She has a very good bead on what I need and packages it in a way that can be used effectively. She is also very responsive.”
“Claire鈥檚 strengths include her ability to understand our needs and solve issues with our clients accordingly. Claire is polite, extremely diplomatic but firm during negotiations. She is also extremely responsive and understands the law better than anyone we’ve encountered.”
Claire is 鈥渙utstanding, extremely responsive and efficient,鈥 adding: 鈥淪he is an excellent communicator and negotiator.鈥
Transactional Counsel
Claire provides transactional counsel to health care organizations, hospitals, physician groups, and other health care providers. She has drafted and negotiated documents relating to hospital acquisitions, joint ventures, health care provider mergers, service agreements, professional services arrangements, and management agreements. She conducts health regulatory due diligence and advises on health care company acquisitions and investments.
Regulatory Compliance
Claire works with clients on state licensure regulatory compliance issues, as well as compliance with Medicare and Medicaid rules and regulations. She has extensive experience assisting digital health clients with complex health care privacy compliance issues and advising on potential fraud and abuse concerns. Claire also provides regulatory advice to health plans and risk bearing organizations on compliance with various state and federal health insurance laws and regulations, including the Knox-Keene Act.
Claire is a member of the Health Care Transactional and Health Care Regulatory Practice Groups and a member of the Health Care & Life Sciences Sector.
Representative Experience
- Represented a California regional health care system in the acquisition of several physician practices.
- Advised multiple health care providers on reproductive health care compliance issues.
- Represented a California hospital on joint venture with an orthopedic hospital.
- Represented a California county in the acquisition of a rural medical practice.
- Represented a multistate women鈥檚 health care practice on several joint venture affiliations with regional health systems.
- Assisted a national digital health provider with the restructuring of its virtual care service line.
- Advised multiple providers and hospital system clients in connection with physician alignment models and strategies, including leasing, professional services, and employment arrangements.
- Negotiated physician and provider employment agreements on behalf of a multispecialty physician group.
- Counseled health care providers on general corporate and regulatory compliance matters, including California licensure compliance, professional scope of practice issues, and marketing compliance.
- Assisted hospitals, physicians, and other health care providers which establishing concierge medical practices.
- Advised a California nonprofit hospital system on licensing and change of ownership issues in connection with management arrangement with a strategic buyer.
- Represented a California county in the creation of a public hospital authority and transition of ownership of the public hospital from the county to the hospital authority.
- Represented the selling shareholders of a Medi-Cal managed care plan in the sale of the plan.
- Negotiates business associate agreements for covered entities, business associates, and subcontractors.
- Assists clients in responding to HIPAA data breaches and security incidents.
- Advises on data privacy issues, including compliance with HIPAA, 42 C.F.R Part 2, and state privacy laws such as California鈥檚 Confidentiality of Medical Information Act.
Awards and Recognition
- Selected by Los Angeles Business Journal聽as Top 100 Lawyer (2025)
- Selected by Los Angeles Business Journal聽as Women of Influence: Health Care (2025)
- Selected by L.A. Business First as Women of Influence (2024)
- Los Angeles Business Journal, Health Care Leadership Awards, Trusted Advisor of the Year (2023)
- Chambers USA, Healthcare (2020-2026)
- California Super Lawyers 鈥 Rising Stars庐 list (2019-2021), which recognizes the top 2.5% of California lawyers under 40
Affiliations
- Member of Healthcare Law Section of the Los Angeles County Bar Association
- Member of California Society for Healthcare Attorneys
- Member of American Health Lawyers Association
- Member of Foley鈥檚 National Women’s Network
Presentations and Publications
- Co-author, 鈥淧hysician-Hospital Affiliation Models,鈥 American Health Law Association, Representing Physicians Handbook (5th ed.) (October 2025)
- Co-author, 鈥淣avigating Abortion Training for Resident Physicians in a Post-Dobbs Era,鈥 California Health Law News (Summer 2025)
- Co-author, 鈥淐alifornia: AB 1415 and Expanded OHCA Oversight 鈥 What Providers, MSOs, and Investors Need to Know,鈥澛Health Care Law Today聽(March 4, 2025)
- Author, 鈥淐alifornia: Private Equity Management of Medical Practices Again Appears in Proposed Legislation,鈥 Health Care Law Today (February 20, 2025)
- Author, 鈥淐alifornia: Five Things You Need to Know About AB 3129,鈥 Health Care Law Today (September 10, 2024)
- Speaker, 鈥淪trategies for Working with and Discharging Homeless Populations,鈥 Hospital Association of Southern California’s 2024 Annual Meeting (May 21, 2024)
- Author, 鈥淐alifornia: Health Care Transactions 鈥淢aterial Change鈥 Regulations are Finalized,鈥 Health Care Law Today (January 8, 2024)
- Co-author, 鈥淐alifornia: Proposed Regulations Impacting the M&A Market in California,鈥澛Health Care Law Today聽(August 28, 2023)
- Co-author, 鈥淐alifornia: Health Care M&A Market Heats up as New Regulator Takes a Closer Look,鈥澛Health Care Law Today聽(December 8, 2022)
- Speaker, 鈥淗ot Button Issues in Privacy 鈥 CCPA and HIPAA,鈥 ACC Health Law Network Webinar (May 3, 2022)
- Speaker, 鈥淐onsiderations for Structuring Physician Group Acquisitions,鈥 American Health Law Association (April 25-27, 2022)
- Co-author, 鈥淐ompliance Issues in Hospital and Health System Sports Sponsorships,鈥澛Health Care Law Today (February 9, 2022)
- Speaker, 鈥淲hose Medical Practice is it Anyway? A Discussion of California鈥檚 Prohibition on the Corporate Practice of Medicine,鈥 California Society for Healthcare Attorneys (November 19, 2021)
- Co-author, 鈥淐MS Requires COVID-19 Vaccination for Health Care Facility Staff,鈥 Health Care Law Today (November 8, 2021)
- Author, 鈥淐alifornia Expands Use of Telehealth to Involuntary Commitment Evaluations,鈥澛犅Health Care Law Today (March 2, 2021)
- Speaker, 鈥淗ot Button Issues in Privacy 鈥 CCPA and HIPAA,鈥澛 ACC Health Law Network Webinar (March 3, 2020)
- Co-author, 鈥淔QHCs: Practical Impacts of Governance Requirements,鈥澛Health Care Law Today聽(January 8, 2020)
- Co-author, 鈥淧roposed Changes to Part 2 Rules Ease Substance-Use Disorder Record Sharing,鈥澛Health Care Law Today聽(August 27, 2019)
- Author, 鈥淐hanges to California鈥檚 Knox-Keene Act Potentially Impact California Health Care Providers,鈥澛Health Care Law Today聽(June 27, 2019)
- Speaker, 鈥340B Program Updates,鈥 Southern California HFMA Summer Program (July 20, 2017)
- Co-author, 鈥淐alifornia鈥檚 End of Life Option Act: Key Requirements and Considerations,鈥澛Health Care Law Today (June 1, 2016)
- Speaker, 鈥淭elemedicine Privacy and Security: Safeguarding Protected Health information and Minimizing Risks of Disclosure,鈥 Strafford Webinar (August 13, 2015)
- Co-author, 鈥淥IG Releases Compliance Guidance for Health Care Governing Boards,鈥澛Health Care Law Today聽(April 30, 2015)
- Co-author, 鈥淧rivacy Issues in the Sharing of Genetic Information,鈥澛番茄社区; Lardner White Paper聽(September 18, 2014)
- Author, 鈥淎 Matter of Conscience: United States v. Seeger and the Supreme Court鈥檚 Historical Failure to Define Conscientious Objector Status Under the First Amendment,鈥澛Hastings Constitutional Law Quarterly聽(Fall 2010)
Foley Achieves Top Rankings in Chambers USA 2026
Medicare鈥檚 New NPI and Attestation Rules for Hospital Off-Campus Departments: Preparation Starts Now
Recent Developments for Private Company M&A
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California AB 1415 Signed: Enhanced Health Care Transactions Scrutiny for Weary Investors
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