Skip to main content

Nixon Peabody LLP

  • People
  • Capabilities
  • Insights
  • About
Trending Topics
    • People
    • Capabilities
    • Insights
    • About
    • Locations
    • Events
    • Careers
    • Alumni
    Practices

    View All

    • Affordable Housing
    • Community Development Finance
    • Corporate & Finance
    • Cybersecurity & Privacy
    • Entertainment & Media
    • Environmental
    • Franchising & Distribution
    • Government Investigations & White Collar Defense
    • Healthcare
    • Intellectual Property
    • International Services
    • Labor, Employment, and Benefits
    • Litigation
    • Private Wealth & Advisory
    • Project Finance
    • Public Finance
    • Real Estate
    • Regulatory & Government Relations
    Industries

    View All

    • Aviation
    • Cannabis
    • Consumer
    • Energy
    • Financial Services
    • Healthcare
    • Higher Education
    • Infrastructure
    • Manufacturing
    • Nonprofit Organizations
    • Real Estate
    • Sports & Stadiums
    • Technology
    Value-Added Services

    View All

    • Alternative Fee Arrangements

      Developing innovative pricing structures and alternative fee agreement models that deliver additional value for our clients.

    • Continuing Education

      Advancing professional knowledge and offering credits for attorneys, staff and other professionals.

    • Crisis Advisory

      Helping clients respond correctly when a crisis occurs.

    • DEI Strategic Services

      Providing our clients with legal, strategic, and practical advice to make transformational changes in their organizations.

    • eDiscovery

      Leveraging law and technology to deliver sound solutions.

    • Environmental, Social, and Governance (ESG)

      We help clients create positive return on investments in people, products, and the planet.

    • Global Services

      Delivering seamless service through partnerships across the globe.

    • Innovation

      Leveraging leading-edge technology to guide change and create seamless, collaborative experiences for clients and attorneys.

    • IPED

      Industry-leading conferences focused on affordable housing, tax credits, and more.

    • Legal Project Management

      Providing actionable information to support strategic decision-making.

    • Legally Green

      Teaming with clients to advance sustainable projects, mitigate the effects of climate change, and protect our planet.

    • Nixon Peabody Trust Company

      Offering a range of investment management and fiduciary services.

    • NP Capital Connector

      Bringing together companies and investors for tomorrow’s new deals.

    • NP Second Opinion

      Offering fresh insights on cases that are delayed, over budget, or off-target from the desired resolution.

    • NP Trial

      Courtroom-ready lawyers who can resolve disputes early on clients’ terms or prevail at trial before a judge or jury.

    • Social Impact

      Creating positive impact in our communities through increasing equity, access, and opportunity.

    • Women in Dealmaking

      We provide strategic counsel on complex corporate transactions and unite dynamic women in the dealmaking arena.

    1. Home
    2. Who We Are
    3. Media
    4. Nixon Peabody continues its West Coast expansion, adding another partner to its Los Angeles office

      Media

    Nixon Peabody continues its West Coast expansion, adding another partner to its Los Angeles office

    April 25, 2022

    LinkedInX (Twitter)EmailCopy URL

    Contact

    Courtney DeMesme-Anders

    Media Relations Senior Manager

    • Office +1 213.629.6058
    • cdemesmeanders@nixonpeabody.com

    New litigation partner is the sixth partner to join the firm in Southern California this year.

    Los Angeles, CA. Nixon Peabody LLP is pleased to welcome Jonah D. Retzinger, a complex disputes partner serving the healthcare industry, to its Los Angeles office.

    Jonah is the sixth new partner to join the firm’s Los Angeles office this spring. In addition to these partners, the firm also added five new lateral associates and resident attorneys to the Los Angeles office in recent weeks. 

    Jonah represents clients across the healthcare sector, including national physician practice management organizations and affiliated medical groups, academic medical centers, hospitals, integrated health systems, and Medicare Advantage Organizations in complex health regulatory disputes, False Claims Act (FCA) litigation, and government enforcement actions.

    “Beyond his exceptional reputation as a litigator, clients will benefit from Jonah’s strong knowledge of the healthcare industry as he helps companies and organizations navigate complex regulatory issues,” said Sonia Nayak, managing partner of Nixon Peabody’s Los Angeles office. “Jonah is also a great fit for our firm’s culture, and his arrival speaks directly to our focus on growing our California presence and attracting top talent.”

    In addition to his FCA practice, Jonah has significant experience defending healthcare entities in disputes involving the reasonableness of charges for healthcare services. He also regularly advises clients on the applicability and implementation of various healthcare laws affecting the revenue cycle for healthcare services, including the federal No Surprises Act (NSA) and associated regulations and guidance.

    “Jonah’s FCA experience, wide-ranging commercial litigation work, and entrepreneurial spirit will enhance our team, both on the West Coast and nationally," said John Ruskusky, head of Nixon Peabody’s Complex Disputes practice. “In particular, his unique knowledge of healthcare revenue-cycle management dovetails nicely with our platform, and I have no doubt he will be a tremendous asset to our national healthcare practice and our California healthcare clients, in particular.”

    Jonah earned his JD, cum laude, from Duke University School of Law and his BBA from the College of William and Mary. He is an active member of the American Health Lawyers Association, the American Bar Association, and the Healthcare Financial Management Association.

    Practices

    HealthcareHealthcare Regulatory & ComplianceHealthcare Dispute ResolutionLife Sciences & Healthcare Compliance and InvestigationsLitigationComplex DisputesFalse Claims Act & Qui Tam MattersManaged Care Contracts & Network Development

    Professionals in the Practice Area

    View All
    • Lindsay Maleson

      Partner / Practice Group Leader, Healthcare
      • Long Island
      • Office:+1 516.832.7627
      • lmaleson@nixonpeabody.com
      Lindsay Maleson
    • Jill H. Gordon

      Partner / Co-chair, Life Sciences Practice
      • Los Angeles
      • Office:+1 213.629.6175
      • jgordon@nixonpeabody.com
      Jill H. Gordon
    • Michele A. Masucci

      Partner
      • Long Island
      • Office:+1 516.832.7573
      • mmasucci@nixonpeabody.com
      Michele A. Masucci
    • Jéna M. Grady

      Partner
      • New York City
      • Office:+1 212.940.3114
      • jgrady@nixonpeabody.com
      Jéna M. Grady
    • Harsh P. Parikh

      Partner
      • Los Angeles
      • Office:+1 213.629.6108
      • hparikh@nixonpeabody.com
      Harsh P. Parikh
    View All

    Insights And Happenings

    • Press Release

      Nixon Peabody expands Healthcare practice with another returning attorney

      June 7, 2022
    • Press Release

      Nixon Peabody attorneys, practices recognized by Chambers USA

      June 1, 2022
    • Alert

      NYS draft 1115 waiver amendment—State seeks $13.5 billion from federal government

      May 6, 2022

    Subscribe to stay informed of the latest legal news, alerts, and business trends.Subscribe

    • People
    • Capabilities
    • Insights
    • About
    • Locations
    • Events
    • Careers
    • Alumni
    • Cookie Preferences
    • Privacy Policy
    • Terms of Use
    • Accessibility Statement
    • Statement of Client Rights
    • Purchase Order Terms & Conditions
    • Nixon Peabody International LLC
    • PAL
    © 2025 Nixon Peabody. All rights reserved