Internal Medicine, Endocrinology, Diabetes & Metabolism in BROOKLYN, NY
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Dr. John Leff is a physician specializing in Internal Medicine, Endocrinology, Diabetes and Metabolism, based in Brooklyn, NY.
Generated from public NPI Registry data only. Not independently verified — confirm credentials directly with the practice.
Dr. JOHN LEFF specializes in Internal Medicine, Endocrinology, Diabetes & Metabolism.
Dr. JOHN LEFF practices in BROOKLYN, NY.
Dr. JOHN LEFF's NPI number is 1689693327.