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Clemens Bergwitz, MD

Associate Professor of Medicine

Contact Information

Clemens Bergwitz, MD

Patient Care Location

Mailing Address

  • Endocrinology

    PO Box 208020

    New Haven, CT 06520-8020

    United States



Clemens W.H. Bergwitz, MD, is an endocrinologist at Yale Medicine who sees patients with primary hyperparathyroidism, general endocrine disorders, hyperthyroidism, thyroid nodules, adrenal disorder, hypophosphatemic disorders and hypogonadism.

Dr. Bergwitz’s characterizes the endocrine system as the human body’s own data messaging system. “It sends information to regulate some of our body’s most critical functions,” he says. In addition to treating patients, Dr. Bergwitz conducts research on many of these conditions, and his lab has worked on projects that test various therapies for hereditary endocrine disorders. “I am really a physician-scientist. My patients inspire my research, which eventually leads back to the bedside,” he says.

Dr. Bergwitz believes that patients should be the expert of their own illness. He strives to explain conditions and treatments in plain language so that patients not only understand their disorder, but also the biological mechanisms behind it. “I’m interested in providing my patients with the information they need to not only understand their condition, but to empower them to take good care of themselves,” he says.

Education & Training

  • Fellowship
    Massachusetts General Hospital (2006)
  • Residency
    Massachusetts General Hospital (2003)
  • Fellowship
    NICHD, NIH (2001)
  • Residency
    Hannover Medical School (1999)
  • Research Fellowship
    Massachusetts General Hospital and Harvard Medical School (1996)
  • MD
    Hannover Medical School (1993)
  • BA
    Wilhelm Gymnasium, Chemistry and Ancient Greek (1986)


  • Advances in FGF23 Signaling
    Brighton, United Kingdom 2019
  • Metabolic and endocrine sensing of phosphate – insights from genetic disorders
    Nantes, France 2017
  • Phosphate Sensing: Two Sensors, a Metabolic and an Endocrine One?
    Atlanta, United States 2016
  • Disorders of Phosphate Homeostasis and Tissue Mineralization
    Würzburg, Germany 2016
  • Genetic approaches to understanding phosphate homeostasis and Disorders of Phosphate Homeostasis and Tissue Mineralization
    Dresden, Germany 2015
  • Renal phosphaturia and SLC34A3 mutations
    Zürich, Switzerland 2009

Honors & Recognition

AwardAwarding OrganizationDate
Yale Center for Clinical Investigation Pilot on "The impact of phosphate metabolism on healthy aging"2019
O’Brien Center Pilot on “Role of Pyrophosphate in Nephrocalcinosis of Npt2a-/- Mice”2016, 2017, 2018
Young Investigator Award on “Role of the renal sodium-phosphate cotransporter NaPi-IIc in phosphate homeostasis”American Society for Clinical Investigation2007
Young Investigator Award on “Role of the renal sodium-phosphate cotransporter NaPi-IIc in phosphate homeostasis”National Kidney Foundation2007
Von-Recklinghausen-PreisGerman Endocrine Society1996

Professional Service

Deutsche Forschungsgemeinschaft (DFG)Ad-hoc Member2021 - Present
French National Research AgencyAd-hoc reviewer2021 - Present
Research & Development, Pharmaceuticals Pediatric Development, Bayer AG, Berlin, GermanyAdvisor2020 - Present
PRMRP Musculoskeletal health (PRE-MSH-1), Department of DefenseAd-hoc Member2020 - Present
Nature Scientific ReportsGuest Editor2019 - Present
Skeletal Biology Development and Disease (SBDD), NIHAd-hoc Member2017 - Present

Departments & Organizations