Mark J. Keller

Experience & Practice Focus

Mark J. Keller has more than 35 years of legal experience representing individuals facing serious medical, financial, and personal challenges. A significant focus of his practice is Social Security Disability representation, helping clients navigate SSDI applications, denials, appeals, and hearings with clarity and steady guidance.

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In addition to his disability practice, Mark represents clients in related areas where injury, incapacity, or long-term planning intersect with disability concerns.

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Social Security Disability Representation

Mark represents individuals seeking Social Security Disability Insurance (SSDI) benefits before the Social Security Administration. His experience includes handling claims at every stage of the process, from initial applications to hearings before Administrative Law Judges.

When claims are denied, Mark is prepared to pursue appeals, including matters before the United States District Courts for the Eastern and Southern Districts of New York when appropriate. His approach focuses on careful case evaluation, development of medical evidence, and clear communication throughout the process.

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Guardianship Matters

Mark also handles guardianship cases involving children and disabled adults, helping families navigate court proceedings to ensure appropriate care, protection, and legal authority when needed.

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Personal Injury Representation

Mark represents individuals who have suffered serious injuries in automobile, construction, sidewalk, and premises liability accidents. His work in personal injury matters often overlaps with disability issues involving long-term medical conditions, loss of work capacity, and financial stability.

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Wills and Estates

As part of his broader practice, Mark assists clients with wills and estate planning, helping individuals protect their assets and ensure their wishes are carried out for loved ones.

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Bar Admissions:

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Mark Keller is admitted to practice law in:

• New York State

• United States District Courts for the Eastern, Southern, and Northern Districts of New York

• The United States Supreme Court

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If your benefits claim was wrongfully denied, Mark has the experience and determination to appeal your case at the federal level.

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Judicial Experience:

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• Small Claims Arbitrator – Civil Court of the City of New York, Queens County

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Memberships:

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• Queens County Bar Association

• National Organization of Social Security Claimants’ Representatives (NOSSCR)

• The Brandeis Association (Bar Association for Jewish Legal Professionals)