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Katharine Rainer, MD, Internal Medicine, Boston, MA

Katharine Rainer MD

Cardiology


Physician

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  • 330 Brookline AveBoston, MA 02215

Dr. Rainer is on Doximity

As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.

  • Gain access to free telehealth tools, such as our “call shielding” and one-way patient texting.
  • Connect with colleagues in the same hospital or clinic.
  • Read the latest clinical news, personalized to your specialty.

Education & Training

  • New York Presbyterian Hospital (Cornell Campus)
    New York Presbyterian Hospital (Cornell Campus)Fellowship, Cardiovascular Disease, 2025
  • Beth Israel Deaconess Medical Center
    Beth Israel Deaconess Medical CenterResidency, Internal Medicine, 2023 - 2025
  • Beth Israel Deaconess Medical Center
    Beth Israel Deaconess Medical CenterInternship, Internal Medicine, 2022 - 2023
  • Emory University School of Medicine
    Emory University School of MedicineClass of 2022

Certifications & Licensure

  • MA State Medical License
    MA State Medical License 2022 - 2025

Publications & Presentations

PubMed

Press Mentions

  • Higher Doses of Vitamin D3 Do Not Reduce Cardiac Biomarkers in Older Adults
    Higher Doses of Vitamin D3 Do Not Reduce Cardiac Biomarkers in Older AdultsAugust 11th, 2026

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