O’Melveny Worldwide

Nia Zaferis represents health care organizations in investigations and litigation. Her experience includes matters involving the False Claims Act, Medicare Risk Adjustment (MRA), and coding practices.

Nia also maintains an active pro bono practice, and recently helped obtain a not-guilty verdict for a pro bono client who spent more than four years in prison awaiting trial.

  • Representing a national managed care organization in its response to a series of DOJ civil investigative demands related to Medicare Advantage risk adjustment practices
  • Conducting an internal investigation of the coding practices for the subsidiary of a leading managed care organization
  • Conducting an internal review of a national managed-care organization’s compliance with Medicare Advantage risk-adjustment reimbursement rules


Bar Admissions

  • California


  • Loyola Law School-Los Angeles, JD
  • University of Southern California, BA, Communications

Professional Activities


  • Los Angeles County District Attorney’s Office


  • “Trends in US Criminal FCPA Enforcement – Record Numbers Being Driven by Increased Resources and Cooperation Incentives,” Financier Worldwide (January 22, 2020)

Corporate & Government Experience

  • Paralegal Specialist, United States Department of Justice, Criminal Division, Fraud Section, Miami Medicare Fraud Strike Force
  • Intern, United States Department of Health and Human Services, Office of Counsel to the Inspector General

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