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About Me

Don Costello has over 35 years of experience in successfully handling litigation and trial of complex cases in California trial courts, courts of appeal and the California Supreme Court, including: catastrophic injury and death cases, medical and hospital malpractice, trucking accidents and complex business litigation. His cases have been reported in numerous California and national publications, including the National Law Journal, the Wall Street Journal and the New York Times. He has been interviewed on local and national television, written and lectured on legal topics and has taught trial practice skills to attorneys from throughout the United States at the Hastings College of Advocacy in San Francisco.

Mr. Costello is a Life Member (and Founder) of the MILLION DOLLAR ADVOCATES FORUM, one of the most presitigious groups of trial attorneys in America, membership in which is limited to trial attorneys throughout the United States who have won million and multi-million dollar cases. Established in 1993, the organization has over 4000 members. He is also a Life Member of the MULTI-MILLION DOLLAR ADVOCATES FORUM, established in 2007.

For MILLION DOLLAR ADVOCATES FORUM membership information and a list of members, see:

Martindale-Hubbell Law Directory - highest possible rating ("A-V Preeminent") for legal ability and professional ethics (as rated by other lawyers and judges). Rated "A-V" each year 1984 to present.

Member of the Bar of all California state and federal courts, and the U.S. Supreme Court.

FACULTY, College of Advocacy (University of California, Hastings College of Law, San Francisco)

FACULTY, Litigation Advocacy Program, (University of California, Hastings College of Law, San Francisco)

Stanford University
Santa Clara University
Monterey College of Law

Million Dollar Advocates Forum, LLC

Numerous articles and presentations on litigation and trial practice subjects in professional publications, journals and events.



Practice Areas


  1. Personal Injury: 50%
    40 years, 100 cases
  2. Medical Malpractice: 50%
    40 years, 100 cases

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Contact Info

Law Offices of Donald F Costello

PO Box 2684
Del Mar, CA, 92014



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Life MemberMulti-Million Dollar Advocates Forum2007
A-V Preeminent rating each year since 1985Martindale Hubbell rating1985
Life MemberMillion Dollar Advocates Forum1974
Work Experience
TitleCompany NameDuration
PresidentMillion Dollar Advocates Forum, LLC1993 - Present
AttorneyLaw Offices of Donald F Costello1977 - Present
AttorneyFrolik Filley & Schey (San Francisco)1974 - 1977
Law Student summer positionPillsbury Madison & Sutro (San Francisco)1972 - 1972
Association NamePosition NameDuration
Multi-Million Dollar Advocates ForumLife Member / Presdent2007 - Present
Million Dollar Advocates ForumLife Member / President1993 - Present
Martindale-Hubbell ratingRated "A-V' Preeminent (highest)1985 - Present
American Association for JusticeMember1980 - Present
United States Supreme Court BarMember1980 - Present
Publication NameTitleDate
California Trial Lawyers JournalThe Locality Rule in Medical Malpractice CasesN/A
California Trial Lawyers JournalUnderstanding Informed Consent in Medical Malpractice CasesN/A
California Trial Lawyers JournalThe Civil Discovery ActN/A
California Lawyer MagazineMedical Malpractice Time LimitationsN/A
Los Angeles Daily JournalThe Role of the Party Arbitrator in Kaiser Malpractice CasesN/A
County Bar Association JournalDepositions - Civility and Self DefenseN/A
James PublicationsPersonal Injury Trial Notebook (Editorial Advisor)N/A
School NameMajorDegreeGraduated
University of California, Hastings College of the Law (San Francisco)N/AN/A1974
San Francisco State UnvN/AundergraduateN/A
Speaking Engagements
Conference NameTitleDate
Stanford, Univ / Santa Clara Univ / Monterey College of LawLitigation / Trial Practice (guest lecturer)N/A
San Francisco Trial Lawyers AssociationWhat's New in Premises Liabilty Law?N/A
Hastings College of AdvocacyTrial Practice (faculty)N/A