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.

Bar Admissions

• California
• District of Columbia

Education

• Loyola Law School, J.D., 1982
• Tufts University, B.A., magna cum laude, 1979

• 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

• 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)

• Terese A. Mosher Beluris and Carol K. Lucas, Presenters at the 21st Annual Healthcare Law Compliance Symposium