Primary Industries

Industry Associations

  • California Society for Health Care Attorneys (Education Committee)

Bar & Court Admissions

  • State Bar of California
  • U.S. District Court for the Central District of California
  • U.S. District Court for the Eastern District of California
  • U.S. District Court for the Northern District of California
  • U.S. District Court for the Southern District of California

Professional Affiliations

California Bar Association (Litigation)

Los Angeles Bar Association (Health Care & Appellate) 

Community Involvement

American Cancer Society – Race for the Cure

Girl Scouts

Hesby Involved Parents

Pet Orphans

Tiger Woods Foundation


Loyola Law School, Los Angeles, J.D.,

University of California, Los Angeles, B.A. 

Photo of Stacey L. Zill

Stacey L. Zill

Los Angeles
T: 310.299.5500
F: 310.299.5600
Representative Matters
Full Bio

Stacey Zill takes a practical and strategic, client-centered approach to legal matters. She handles complex health care litigation across a wide-range of issues, representing clients in matters involving provider and health plan payment disputes, licensing and compliance, fraud, waste and abuse, breach of contracts and fiduciary duties, and unfair competition.

Ms. Zill litigates at the trial and appellate levels in federal and state courts, and advocates in administrative proceedings and before regulatory agencies. She has a proven track record of securing favorable results for clients in matters involving class actions and derivative actions at trial and through arbitrations and mediations. Ms. Zill manages all phases of the litigation process, from pre-litigation counseling and strategy through appeal. Her extensive appellate experience has resulted in numerous published opinions.

In and out of the health care context, Ms. Zill consistently demonstrates her knowledge and expertise representing clients in actions involving claims for copyright infringement, professional liability, breach of contract, defamation, fraud, misappropriation of trade secrets, and product liability.

She is a member of the education committee on the California Society for Healthcare Attorneys.


Ms. Zill earned her J.D., from Loyola Law School, Los Angeles, cum laude, Order of the Coif (top 10%). She received her B.S. in Political Science with a specialization in Business Administration, cum laude, from the University of California, Los Angeles.

Awards & Special Recognition

Ms. Zill was named a Southern California Super Lawyers "Rising Star" in both 2008 and 2010. Ms. Zill was also named to the list of Southern California Super Lawyers from 2014 - 2017.

Representative Matters

  • Appointment of a Receiver: Prevented corporate waste and theft by securing the appointment of a receiver to take control of a corporation that was seized by its majority shareholder.

  • Billing Mismanagement: Represented senior living facility against billing company for mismanagement of accounts / claims.

  • Breach of Contract, Trade Secret Misappropriation: Secured a multi-million dollar settlement for a wholesale provider of emergency roadside services following preliminary party depositions in a case involving breach of contract, trade secret misappropriation and tortuous interference claims against a GE subsidiary.

  • Claim Underpayment: Obtained favorable results on behalf of providers against various medical groups and plans that systematically down-coded and underpaid claims.

  • Coding Disputes: Spearheaded the audit of claims to successfully negotiate a resolution of coding disputes with False Claims Act threats before litigation commenced.

  • Continuity of Care: Secured injunctive relief to permit a provider, whose contract with the medical group was terminated, to continue to treat patients based on continuity of care.

  • Defense of Tenant Initiated Actions: Secured the dismissal – as a discovery sanction – of a landlord-tenant complaint alleging claims for breach of contract, breach of the implied warranty of habitability, retaliatory distress and breach of rent control regulations.

  • Failure to Authorize: Attacked causation leading to the negotiation of a favorable settlement on behalf of a medical group of claims based on the failure to authorize medically necessary treatment resulting in amputation.

  • Fraud: Successfully represented three defendants and one cross-complainant in a 12-day jury trial, winning a defense verdict on all charges and $850,000 on the cross-complaint, involving competing allegations of fraud with respect to a closely held corporation.

  • Lease Disputes: Successfully negotiated a favorable settlement for tenant in a $30 million lawsuit brought by the landlord relating to the scope of the tenant’s obligation to “maintain” the property under a triple net lease.

  • Medicare Marketing Violations: Obtained the dismissal of claims against an IPA accused of Medicare marketing fraud and regulatory violations.

  • Multi-Issue Disputes: Represented clients at the trial and appellate levels involving issues relating to the corporate practice of medicine, capitation delegation, physician balance billing practices, management arrangements, risk pools and/or fraud, waste and abuse.

  • Reimbursement Actions: When representing clients on the payer side, successfully defended against a multi-million dollar reimbursement action involving claims of fraud and breach of contract. When representing clients on the provider side (e.g., emergency physician groups and pharmacy clients), successfully pursued reimbursement actions against claims of fraudulent upcoding and unbundling.
  • Shareholder Derivative Action: Secured a favorable settlement in shareholder derivative action against majority shareholders and members of the Board of Directors who had misappropriated assets and breached their fiduciary duties by taking dividends disguised as compensation.
  • Shareholder Derivative Action: Secured judgment at trial in defense of officers and directors in corporate governance action alleging fraud, making of "secret profits" and breach of fiduciary duties. Successfully prosecuted claims on behalf of minority shareholders where the majority shareholder attempted a corporate “squeeze out”, and defended derivative actions against corporate officers and directors for breach of contract and breach of fiduciary duty.

  • Statutory Interpretation: Secured dismissals of claims against health care organizations in disputes with both contracted and non-contracted providers involving the entitlement to payment under the Knox-Keene Health Care Service Plan Act.

  • Unfair Competition: Successful prosecution of an injunctive relief action for a large transportation company involving unfair competition, improper solicitation of customers and the covenant not to compete.

Published Decisions

Published Opinions
  • Prospect Med. Gp., Inc. v. Northridge Emergency Med. Gp. (2009) 45 Cal. 4th 497
  • Coast Plaza Doctor’s Hosp. v. UHP Healthcare (2002) 105 Cal. App. 4th 693
  • Unetco Indus. Exch. v. Homestead Ins. Co. (1997) 57 Cal. App. 4th 1459
Unpublished Opinions
  • Irena, Inc. v. United States Gypsum Company (2013) Second Appellate District, Division Seven, Appeal No. B239727
  • Sedaghat-Pour v. Wilshire-Westlake Building, Inc. (2012) Second Appellate District, Division Two, Appeal No. B232584
  • Amorosi v. Kaiserman (2011) Second Appellate District, Division Three, Appeal No. B226627
  • Shaham v. P&J Medical Management, Inc. (2011) Second Appellate District, Division Two, Appeal No. B223323

Media Mentions


Past Speaking Engagements