Exhibit 99.1

ProAssurance to Participate in Sandler O'Neill Insurance Conference

    BIRMINGHAM, Ala.--(BUSINESS WIRE)--Sept. 3, 2003--ProAssurance
Corporation's (NYSE:PRA) President and Chief Operating Officer, Victor
T. Adamo, will be part of a panel discussion on the medical liability
industry at Sandler O'Neill's 2003 Insurance Conference. The
Conference will be held at the Grand Hyatt Hotel in New York City on
September 16, 2003. Mr. Adamo's presentation will open the panel
discussion at 7:45 AM EDT.
    The event will be webcast on the Investor Relations section of
ProAssurance's website, www.ProAssurance.com, or on Sandler O'Neill's
website, www.sandleroneill.com. Investors who plan to listen to the
webcast should pre-register through either site prior to September
16th. An internet replay will be available from September 18, 2003
until October 17, 2003. Interested investors may also listen to the
conference by dialing (800) 239-8730 and choosing Session 1; there
will be no telephone replay. Presentation materials used by
ProAssurance will be available on the Company's website.

    About ProAssurance

    ProAssurance Corporation is a specialty insurer with more than
$2.5 billion in assets and more than $630 million in gross written
premiums. As the nation's fourth largest writer of medical
professional liability insurance, ProAssurance's subsidiaries, The
Medical Assurance Company, Inc., Medical Assurance of West Virginia,
Inc., ProNational Insurance Company and Red Mountain Casualty
Insurance Company, Inc., are recognized leaders in developing
solutions which serve the needs of the evolving health care industry.
ProAssurance is the tenth largest writer of personal auto coverage in
Michigan through its subsidiary, MEEMIC Insurance Company. A. M. Best
assigns a rating of "Excellent" to ProAssurance and its subsidiaries;
Standard & Poor's assigns the Company's professional liability
carriers a "Strong" rating.

    CONTACT: ProAssurance Corporation, Birmingham
             Frank B. O'Neil, 800-282-6242; 205-877-4461
             foneil@ProAssurance.com