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" Substantial experience in the defense of physicians and other medical professionals in medical malpractice and professional disciplinary cases. We have the knowledge, experience skills and resources to effectively, successfully and zealously represent our clients. "

Biographical summaries of our Attorneys

  • Professional Defense
  • Environmental Liability
  • Premises Liability
  • Insurance Coverage and Regulation
  • Appellate Practice
  • Construction Claims and Accidents
  • Medical Malpractice
  • Products Liability
  • General Liability
  • Employment and Labor
  • Property Damage
  • Casualty Actions
  • Commercial Litigation

Our Goal.

We are committed to working closely with our clients to achieve cost-effective results that are consistent with their business objectives.

About The Firm

Ellenberg Gannon Henninger & Fitzmaurice, LLP was formed by Michael A. Ellenberg and was originally known as Ellenberg & Hutson, LLP, which was established in 1989. David Gannon became a partner in January 2007. On November 1, 2017, John Henninger and Stacy Fitzmaurice joined the firm as partners in a merger with Geisler, Henninger and Fitzmaurice, LLP. The firm consists of four partners and four associates.

The firm's practice is focused on the defense of professionals, including physicians and hospitals, dentists, nurses, physicians’ assistants, medical and dental clinics, professional misconduct defense, premises liability, general liability, as well as insurance coverage and regulation and appellate practice.

In addition to professional and general negligence cases, the firm has represented a number of hospitals in general premises liability matters, as well as other entities, including domestic and international insurance companies and their insureds. The firm also focuses on the defense of construction claims and accidents, products liability, general liability, employment and labor, property damage and casualty actions.

Having practiced at firms of all different sizes before starting Ellenberg, Gannon Henninger & Fitzmaurice, LLP, including at LeBoeuf, Lamb, Leiby and MacRae where Mr. Ellenberg achieved great notoriety, it was Mr. Ellenberg’s goal to create a firm that would offer clients the best of both worlds the professionalism, quality, and responsiveness of a large firm, and the familiarity and savings of a small firm.

Substantial experience in the defense of high exposure medical malpractice cases.

Mr. Ellenberg has successfully defended at trial obstetricians, neurologists, and other physicians in high exposure, alleged brain damage and other injury cases since 1989. Mr. Henninger has also been actively defending physicians at trial since his first verdict in 1992. In addition, Mr. Gannon and Ms. Fitzmaurice all possess first hand trial experience with medical malpractice cases. The associate attorneys possess significant experience in handling cases from their inception and in preparing high exposure cases for trials. The attorneys at EGHF have a proven track record of excellence in advocacy. We are highly regarded not only by our clients but also by our peers in the industry.

Substantial experience in the defense of high exposure construction, premises and products liability and accident cases.

The firm has been involved in defending at trial companies and individuals in high exposure accident cases.

Substantial experience providing risk management and related services.

We routinely advise our clients, physicians, businesses and insurers on risk management issues.

Quality Personnel and Resources.

We believe that we have the skills and resources to effectively, successfully and zealously represent our clients, from individuals to large corporate and institutional clients.


Contact Us

New York City

494 Eighth Avenue 7th Floor New York, NY 10001

Tel: (212) 629-8585

Fax: (212) 629-6017

Long Island

170 Old Country Road, Suite 303 Mineola, NY 11501

Tel: (516) 743-9400

Fax: (516) 743-9407

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