Skip to content Philip H. Lo


5 Park Plaza
Suite 1100
Irvine, CA 92614

Los Angeles
633 West Fifth Street
52nd Floor
Los Angeles, CA 90071

San Francisco
315 Pacific Avenue
San Francisco, CA 94111

San Diego
101 W. Broadway
Suite 2000
San Diego, CA 92101

Las Vegas
300 S. 4th Street
Suite 1550
Las Vegas, NV 89101


J.D., University of California, Hastings Law School, 1995

B.A., Psychology and Political Science, University of California, Los Angeles, 1992


  • Chinese (Mandarin)

Philip H. Lo is a Partner in the Orange County office of GRSM. He focuses much of his practice in litigation. His core practice is insurance defense, encompassing several areas, including professional liability. Philip’s practice includes federal and state courts, as well as binding arbitration, trials, and administrative hearings.

His professional liability practice includes the defense of various professionals, including, but not limited to, physicians, medical professionals, hospitals, treatment and rehabilitation centers, attorneys, architects, engineers, agents, and brokers. Specialty areas of professional liability include innovative therapies and treatments involving embryos, as well as managed care liability. Employing both medical malpractice and products liability experience provides an edge in preparing the defense of medical professionals utilizing innovative science and technology.

Philip also defends corporations from civil and criminal liability, governmental actions, and regulatory hearings, as well as white collar and corporate criminal actions and the misappropriation of trade secrets and proprietary information.

He has a strong environmental and product liability practice, focusing on toxic torts and products involving strict liability, fraudulent concealment, and unfair practices claims for liability.

He believes that a strong defense is created well before trial begins, often resolving actions favorably for clients through the strength of his discovery and motion practice. Ever mindful of the economic pressures facing his clients, Philip vigorously defends his clients and their bottom line. He believes in a partnership with both the insured and the insurer, enabling him to successfully defend the insured effectively and efficiently. Corporate clients also appreciate this approach, which is collaborative with general counsel while providing cost effective service.


  • Supreme Court of California
  • Supreme Court of Nevada
  • U.S. District Court, Central, Eastern, and Northern Districts of California
  • U.S. District Court, Nevada


  • Inns of Court
  • Association of Southern California Defense Counsel
  • The State Bar of California
    • Insurance Law Committee, Member and Vice Chair 2009-2012
    • Insurance Law Committee, Chair, 2012-2013
    • Business Litigation Committee, Charter Member, 2013-2015


Publications & Presentations