Terese A. Mosher Beluris

Buchalter, A Professional Corporation

Recognized since 2009

Los Angeles, California

Practice Areas

Administrative / Regulatory Law

Commercial Litigation

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Terese A. Mosher Beluris is a partner in the law firm of McDermott Will & Emery LLP and is based in the firm’s Los Angeles office. She has extensive experience litigating actions on behalf of health care service plans, management services organizations, and providers involved in commercial and managed care disputes; defending financial institutions involved in letter of credit, depository operations, and contractual disputes; representing corporations and partnerships involved in fraudulent transfer disputes; and representing receivers and assignees in state, federal, and bankruptcy courts. Terese also has represented petitioners and respondents in contested conservatorship proceedings, will contests, and actions for breaches of trust and testamentary promise in probate and civil courts.

In the managed care arena, Terese has extensive experience litigating putative class actions and other actions on behalf of health plans, health care providers, and intermediaries. Terese has successfully defended various entities against governmental and/or private claims that they were engaged in the corporate practice of medicine or dentistry. Most recently, Terese successfully defended California entities in a putative class action which were charged with operating illegally without a requisite Knox-Keene license and violating the prohibition against the corporate practice of medicine. In the courts of California and Indiana, Terese also has petitioned for judicial review of state decisions not to award health services-related contracts to petitioners. In a putative class action, Terese has successfully defended a California health plan against antitrust claims arising from an alleged conspiracy to redline certain geographic markets. In other actions, Terese successfully resolved claims for rescission against a Texas PPM company that allegedly implicated Florida’s anti-fee splitting strictures, and defended a renal dialysis provider against claims for alleged overpayments made by a Colorado health plan. In California, Terese has resolved individual and putative class claims for data privacy breaches. In an action in Arizona, Terese successfully defended an Arizona PHO against claims which sought to impose Potvin-type processes and obligations on the Arizona payor-physician relationship.

In connection with representations of financial institutions and receivers, Terese has successfully opposed reclamation petitions, defended against claims for violation of the midnight deadline, challenged alleged priorities of security interests under the California Commercial Code, obtained turnover of assets, and defended appraisers sued on their valuations. She also has represented numerous financial institutions in a variety of letter of credit disputes involving antideficiency regulations, wrongful dishonor, and bankruptcy issues.


  • 1000 Wilshire Boulevard, Suite 1500
    Los Angeles, CA 90017-1730


  • Tufts University, BA, graduated 1979

Bar Admissions

  • The State Bar of California
  • The District of Columbia Bar

Buchalter, A Professional Corporation
Headquarters: Los Angeles, California

40 The Best Lawyers in America® awards

17 Best Lawyers: Ones to Watch in America awards

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Full Firm Profile

Recognized in The Best Lawyers in America® 2022 for work in:

  • Commercial Litigation
  • Administrative / Regulatory Law

Special Focus

  • Health Care
  • Managed Care


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