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Nancy Rennert, MD, Endocrinology, Norwalk, CT

Nancy J Rennert MD CPHQ,FACE

Diabetes, Obesity, Osteoporosis & Bone Metabolism Medicine, Thyroid


Chief of Endocrinology & Diabetes, Associate Clinical Professor of Medicine, Yale School of Medicine and University of Vermont Larner College of Medicine

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  • 120 Connecticut AveNorwalk, CT 06854

  • Phone+1 203-899-1770

  • Fax+1 203-336-0604

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Summary

  • Nancy Rennert, MD, is an endocrinologist based in Norwalk, CT, with subspecialties in diabetes, obesity, osteoporosis & bone metabolism medicine, and thyroid disorders. He completed his fellowship in endocrinology, diabetes, and metabolism at Yale-New Haven Medical Center after earning his medical degree from the University of Pittsburgh School of Medicine and completing his internal medicine residency at UPMC Medical Education. His expertise includes diabetes mellitus, thyroid disorders, obesity, and osteoporosis, with a focus on quality improvement. Notably, he has contributed to several publications related to endocrinology and has received recognitions such as Diplomate from the American Board of Obesity Medicine and Top Doctors: New York Metro Area from Castle Connolly.

Education & Training

  • Yale-New Haven Medical Center
    Yale-New Haven Medical CenterFellowship, Endocrinology, Diabetes, and Metabolism, 1990 - 1993
  • UPMC Medical Education
    UPMC Medical EducationResidency, Internal Medicine, 1987 - 1990
  • University of Pittsburgh School of Medicine
    University of Pittsburgh School of MedicineClass of 1987

Certifications & Licensure

  • FL State Medical License
    FL State Medical License 1998 - 2026
  • CT State Medical License
    CT State Medical License 1990 - 2025
  • NY State Medical License
    NY State Medical License 2004 - 2009
  • PA State Medical License
    PA State Medical License 1989 - 1992
  • Endocrinology, Diabetes and Metabolism
    American Board of Internal Medicine Endocrinology, Diabetes and Metabolism

Awards, Honors, & Recognition

  • Diplomate American Board of Obesity Medicine, 2025
  • Top Doctors: New York Metro Area Castle Connolly, 2013-2025
  • Connecticut Magazine Castle Connolly, 2013-2025
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Publications & Presentations

PubMed

Press Mentions

  • The Complicated Relationship Between COVID and Diabetes in CT
    The Complicated Relationship Between COVID and Diabetes in CTNovember 23rd, 2021

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