
Focused Social Security Disability Representation
If you’re applying for Social Security Disability benefits or appealing a denial, the right legal guidance matters. The Social Security process is complex, deadline-driven, and unforgiving of mistakes. Small errors or missing documentation can delay benefits for months or even years.
The Law Office of Mark J. Keller represents individuals at key stages of the SSDI process, including initial applications, reconsiderations, and hearings before an Administrative Law Judge. With more than 35 years of experience handling Social Security Disability cases, we understand how to evaluate claims, present medical evidence, and navigate SSA procedures effectively.
From your first conversation with our office, the focus is on understanding your situation, setting realistic expectations, and determining the most effective path forward in your case.
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This firm helps new applicants and those appealing denials. If you're already receiving benefits and have a question about your case, contact the Social Security Administration directly.
Why Call The Law Office of Mark J. Keller?


SSDI-Focused Guidance
Social Security Disability cases are complex and highly procedural. Our practice is built around helping people apply for benefits and navigate denials, appeals, and hearings with clear guidance at every step.

Proven Results
We have helped clients secure millions in Social Security Disability benefits through well-prepared applications and effective advocacy at the appeals level. Results come from experience, preparation, and knowing how the SSA evaluates claims.

Decades of Experience
With more than 35 years of legal experience, Mark J. Keller understands how medical evidence, work history, and SSA rules intersect. That experience matters when your case depends on details, deadlines, and proper presentation.
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About Mark J. Keller
Mark J. Keller has more than 35 years of legal experience representing individuals facing serious medical and financial challenges. A significant focus of his practice is Social Security Disability representation, helping clients navigate applications, denials, appeals, and hearings with clarity and steady guidance.
Mark is admitted to practice law in New York State, the United States District Courts for the Southern, Eastern, and Western Districts of New York, and the United States Supreme Court. This background allows him to handle Social Security Disability matters at both the administrative and federal levels when necessary.
He earned his Juris Doctor from St. John’s University School of Law and holds both a Bachelor of Science in Business Administration and Finance and an MBA. His combined legal and financial background is especially valuable in disability cases, where medical evidence, work history, and procedural details all matter.
Mark is an active member of the Queens County Bar Association, the National Organization of Social Security Claimants’ Representatives (NOSSCR), and The Brandeis Association. He is committed to staying current with Social Security law and providing clear, direct representation to the clients he serves.
When you call the Law Office of Mark J. Keller, you speak with a team focused on helping you understand your options and determine the most effective path forward.

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