Terese A. Mosher Beluris has extensive experience litigating actions on behalf of health care service plans, management services organizations (MSOs), and providers involved in commercial and managed care disputes. She has also represented financial institutions, fiduciaries, companies and individuals in complex and high stakes litigation, including civil extortion, contested water rights, tortious interference, breach of fiduciary duty, fraudulent transfers, wrongful dishonor claims, contested conservatorship proceedings, will contests, actions for return of abducted children, and actions for breaches of trust and testamentary promise in civil, family law, and probate courts.

In the managed care arena, Ms. Mosher Beluris has litigated putative class actions and other actions on behalf of health plans, health care providers and intermediaries. She has been lead trial counsel in significant matters concerning the imposition of liability upon health care service plans following the default of MSOs and other intermediaries, the defense of pharmaceutical utilization review under the precepts of California Business and Professions Code Section 2056, and alleged violations of due process or fair procedure. She also has substantive experience in risk pool disputes and other conflicts involving remuneration issues between health care providers and health plans.

Ms. Mosher Beluris has successfully defended various entities against governmental and/or private claims that they were engaged in the corporate practice of medicine or dentistry and has petitioned for judicial review of state decisions not to award health services-related contracts to petitioners.

In connection with water rights disputes, Ms. Mosher Beluris has been lead trial counsel in a private company’s successful defense against a Water District’s assertion of a prior and superior right to appropriate from and store water in a watershed and the Water District’s request for a bar against the appropriation and exportation of water, as well as the ensuing agreement for the physical exportation of water from the private property and amelioration of any potential effects of any loss of recharge.

Ms. Mosher Beluris has been named one of The Best Lawyers in America in Administrative/Regulatory Law from 2008 to 2019 and Commercial Litigation from 2014 to 2019. She was named a Southern California Super Lawyer, Health Care, 2007 to 2019. She served as Judge Pro Tem in the Superior Court of California from 1989 to 2000.

Recognition

  • The Best Lawyers in America Administrative/Regulatory Law (2008 to 2025) and Commercial Litigation (2014-2023) and Health Care Law (2023-2025)
  • Southern California Super Lawyer Health Care (2007 to 2022)
  • Obtained judgment following an evidentiary hearing on behalf of intervenor association of physician groups opposing an association of health plans’ petition for writ of mandamus to declare unconstitutional Health and Safety Code section 1342.2’s mandate requiring health care plans to pay the costs for services provided by health care providers for COVID-19 diagnostic and screening testing before January 1, 2022.
  • Obtained a favorable judgment following trial for the return of an abducted minor child to Germany.
  • Obtained a favorable decision establishing a junior appropriative right for the appropriation and exportation of groundwater following a Phase 1 trial, and in preparing for a Phase 2 trial on a physical solution, obtained an agreement regarding exportation that obviated a Phase 2 trial.
  • Obtained judgment following evidentiary hearing in opposition to petition for writ of mandamus on behalf of corporation comprised of licensed physicians arising out of the purported terminations of petitioners’ memberships in the company, and obtained decision affirming the judgment on petitioners’ appeal.
  • Defended an individual in family law and civil courts regarding civil extortion and breach of fiduciary claims through evidentiary hearings and civil pretrial motions, resulting in an agreed-upon resolution.
  • Obtained a favorable judgment following trial for the return of an abducted minor child to Scotland.
  • Defended a California health plan in a putative class action against antitrust claims arising from an alleged conspiracy to redline certain geographic markets.
  • Achieved a favorable jury verdict for a corporate assignee awarding recovery of the value of fraudulently transferred property.
  • Resolved claims against a Texas physician practice management (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 physician-hospital organization (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.
  • Obtained judgment of dismissal for California entities in a putative class action charging the entities with operating illegally without a requisite Knox-Keene license and violating the prohibition against the corporate practice of medicine, and affirmation of the judgment on appeal.
  • 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 seeking to establish community property interests.
  • Obtained judgment of dismissal for distributor against competitor’s claims for trademark infringement and unfair business practices.

Ms. Mosher Beluris earned her JD from Loyola Law School in 1982 and her BA, magna cum laude, from Tufts University in 1979.

  • U.S. Court of Appeals for the Sixth Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • 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
  • U.S. District Court for the District of Colorado
  • Judge Pro Tem, Superior Court of California (1989 to 2000)

Additional Specialties

  • Commercial Litigation
  • Trusts & Estates Litigation