Navigating between regulatory compliance and litigation, the versatility of John Mills’ healthcare practice and the diversity of his clients provide him with a keen understanding of the unique business objectives and risks facing different segments of the healthcare provider community. Among John’s diverse range of clients are hospitals, ambulatory surgery centers, addiction treatment centers, community clinics and 340B covered entities, healthcare districts, physicians and other healthcare professionals, medical groups and IPAs, peer review bodies, management service organizations and medical billing companies, and pharmacies.

Focus on Regulatory Compliance Issues for Healthcare Providers

John’s regulatory compliance work focuses on key issues facing providers that could potentially impede their business operations. He advises clients on compliance with managed care and reimbursement programs, voluntary disclosures of possible Medicare over-payments, medical staff and peer review, analysis of business arrangements to ensure compliance with the anti-kickback and Stark laws, and provides regulatory guidance to covered entities and contract pharmacies in connection with the federal 340B program.

Litigation Success Bolstered by Regulatory Compliance Acumen

John’s deep knowledge of regulatory compliance lends invaluable insight to his litigation practice. John represents and advises healthcare providers on  managed care and reimbursement litigation, commercial business litigation, healthcare fraud lawsuits and investigations, peer review hearings and licensing board proceedings.  In addition to jury trial experience, he has handled numerous arbitrations and administrative hearings. John’s litigation successes include obtaining numerous pre-trial dismissals of lawsuits, including a summary judgment in favor of a large hospital in a civil False Claims Act lawsuit and a demurrer sustained without leave to amend in favor of a large hospital in a whistleblower claim brought by a member of its medical staff. Additionally, he has obtained numerous favorable settlements for healthcare providers in reimbursement disputes with commercial insurance payors and ERISA plans, won a reversal of a finding of ERISA preemption on appeal, and garnered favorable results for clients following arbitrations and administrative proceedings.


John has been recognized by Best Lawyers in America for his work in Health Care Law for eight consecutive years (2016-2023). John has been named to the Southern California Rising Stars or Super Lawyers lists 12 times.

Before Nelson Hardiman

Prior to joining Nelson Hardiman, John practiced at the Los Angeles office of a law firm dedicated solely to the representation of healthcare providers and suppliers, where he focused on managed care litigation, medical staff and peer review compliance and litigation, as well as commercial litigation. John also served as a Law Clerk to the Presiding Justice of the Texas Third District Court of Appeals after finishing law school.

Life Outside the Firm

The range of John’s interest outside the firm is just as diverse as his practice. When he’s not guiding clients through their business challenges, he enjoys family time with his wife and two sons, hiking, sailing, listening to music, reading history and literature, and rooting for Texas Longhorns football.


University of Texas School of Law, J.D.
University of Texas at Austin, B.A.

State Bar of California
State Bar of Texas
Ninth Circuit Court of Appeals
Federal Circuit Court of Appeals
Central, Southern, and Eastern District of California

American Bar Association
Los Angeles County Bar Association, Healthcare Section
American Health Lawyers Association
California Society for Healthcare Attorneys
Beverly Hills Bar Association Healthcare Law Committee (Secretary 2013-Present)


View All