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Terese A.  Mosher Beluris

Terese A. Mosher Beluris



  • Health Care Law
  • Litigation
  • Government, Regulatory & Administrative Law

WSG Practice Industries


California, U.S.A.


Terese A. Mosher Beluris has been lead trial counsel in complex civil litigation and administrative regulatory proceedings involving a broad range of industries, including financial services and health care, as well as proceedings involving privacy, property, and inheritance rights.

Terese has been lead trial counsel in significant matters concerning potential class liability for redlining, water rights, alleged computer hacking and invasion of privacy, violation of Business and Professions Code sections 17200 and 17500, infringement of trademarks, and for return of abducted children under the Hague Convention.


  • The Best Lawyers in America Administrative/Regulatory Law (2008 to 2021) and Commercial Litigation (2014-2021)
  • Southern California Super Lawyer Health Care (2007 to 2021)

Community Involvement

  • Judge Pro Tem, Superior Court of California (1989 to 2000)

Bar Admissions

  • California
  • District of Columbia
Areas of Practice

Government, Regulatory & Administrative Law | Health Care Law | Litigation

Professional Career

Significant Accomplishments

  • Successfully defended a California health plan in a putative class action against antitrust claims arising from an alleged conspiracy to redline certain geographic markets
  • Successfully defended claims for invasion of privacy
  • Obtained judgment of dismissal for California entities in a putative class action under Business and Professions Code sections 17200 and 17500 charging the entities with operating illegally without a requisite Knox-Keene license, false advertising, and violating the prohibition against the corporate practice of medicine, and affirmation of the judgment on appeal
  • Obtained dismissal of trademark infringement claims
  • In successive trials, obtained orders for the return of abducted children
  • Jury verdict for corporate assignee awarding recovery of the value of fraudulently transferred property
  • Resolved claims against a Texas PPM company in a putative class action for rescission of a service agreement that allegedly implicated Florida’s anti-fee splitting strictures, and a renal dialysis provider against claims that it was required to refund payments in excess of the Medicare reimbursement rate to a Colorado health plan
  • Resolved individual and putative class action claims in California for data privacy breaches
  • Obtained judgment for an Arizona PHO against claims that it had wrongfully “deselected” a provider in an action in Arizona that sought to impose Potvin-type processes and obligations on the Arizona payor-physician relationship
  • Defended will contest and putative shareholder attacks on majority shareholders’ corporate interests
  • Obtained judgment for executors and trustees against statutory claims of wrongful transfers and for establishment of community property interests
  • Obtained judgment after trial on a petition for writ of mandamus defeating claims for violations of Corporations Code 12431 and Insurance Code § 1280.7
  • Obtained judgment and won ensuing appeal from judgment successfully defending against claims for wrongful termination in violation of the FEHA in retaliation for opposition to sexual harassment
  • Obtained judgment of dismissal for distributor against competitor’s claims for trademark infringement and unfair business practices

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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