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9th Lobby

Ninth District Headquarters Office - Hawthorne, NY


2022 Ninth District President

Dr. Stephen Ossen

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Office Safety Marketing Toolkit

A members-only, customizable marketing toolkit complete with videos, graphics and accompanying captions for use across social & more!

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ADA Encourages Vaccine


ADA strongly encourages COVID-19 vaccination among dental professionals

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Welcome to the Ninth District Dental Association

The Ninth District Dental Society was formed in 1909 and renamed to the Ninth District Dental Association in 2002. We have a membership of over 1500 dentists in 5 counties: Westchester, Rockland, Dutchess, Orange and Putnam.

In its quest to serve both the public and the profession, the Ninth District embodies the highest ideals.

The mission of the 9th District Dental Association is to serve and support its members and the public by improving the oral health of our community through Advocacy, Continuing Education and Camaraderie.

Latest News Around the Tripartite

Progress continues in ADA system disruption

You will be reassured to know that the ADA does not store members’ credit card data

Thank you for your continued patience as we work to restore operations following the recent cybersecurity incident experienced by the ADA. Here are the latest updates based on frequently asked questions we are hearing from you.

Membership data: At this point in the investigation, member data from the ADA’s membership database has not been compromised; however, it is important to note that the investigation is still ongoing. You will be reassured to know that the ADA does not store members’ credit card data.

Restoring ADA operations: While it is not possible to pinpoint an exact date when ADA operations will be fully restored, each day results in further progress. For example, the system the ADA uses to process membership applications, renewals and product orders has been rigorously tested and verified. What this means is that these members may see charges on their credit cards from the ADA, and they can rest assured that these charges are legitimate.

Contacting the ADA: You can continue to contact us at as we work to restore telephone service and live chat on

Check back regularly as we continue to use the Morning Huddle to provide answers to common questions regarding this incident.


Around the Ninth District