Olwen Hahn, MD

UChicago Faculty Physicians

Olwen Hahn, MD

Associate Professor of Medicine Associate Section Chief of Outpatient Operations, Section of Hematology and Oncology
Medical Director, Hematology and Oncology Outpatient Clinics and Infusion Therapy

Olwen Hahn, MD, specializes in the diagnosis and treatment of breast cancer. Dr. Hahn’s practice primarily focuses on treating patients with all forms of breast cancer. For a comprehensive range of breast cancer treatments, Dr. Hahn offers both standard of care, such as chemotherapy, targeted therapy and endocrine therapy, as well as therapeutic clinical trials in order to deliver the best care for her patients. She is also a proponent of using systemic therapy (chemotherapy, targeted therapy, immunotherapy or endocrine therapy) prior to surgery (neoadjuvant therapy) to better understand how each patient’s individual tumor responds to therapy.

In addition to her clinical practice, Dr. Hahn is committed to elevating cancer care through clinical trials, and is a strong advocate in offering clinical trials to her patients. Additionally, she has worked with the National Cancer Institute (NCI)-sponsored cooperative group Cancer and Leukemia Group B (CALGB) and the Alliance for Clinical Trials in Oncology as an Executive Officer between 2008-2017, where she assisted in the development and conduct of oncology clinical trials. In 2019, she assumed the position of Director and Principal Investigator of the Alliance Central Protocol Operations Program. In this role, Dr. Hahn oversees the clinical operations for a large portfolio of multi-institutional, national oncology studies.

Board Certifications

  • Internal Medicine
  • Medical Oncology

Memberships & Medical Societies

  • American Society of Clinical Oncology

Practicing Since

  • 2007

Languages Spoken

  • English

Medical Education

  • Emory University School of Medicine


  • University of Chicago Medicine


  • University of Chicago Medicine

News & Research

View Published Papers
  • Aetna HMO (specialists only)
  • Aetna POS
  • Aetna PPO
  • BCBS Blue Precision HMO (specialists only)
  • BCBS HMO (HMOI) (specialists only)
  • Cigna HMO
  • Cigna POS
  • Cigna PPO
  • CountyCare *see insurance page
  • Aetna Better Health *see insurance page
  • Medicare
  • Multiplan PPO
  • United Choice Plus POS/PPO
  • United Options (PPO)
  • United Select (HMO & EPO) (specialists only)
  • United W500 Emergent Wrap
  • Aetna Medicare Advantage HMO & PPO
  • BCBS Medicare Advantage HMO & PPO
  • Humana Medicare Advantage Choice PPO
  • Humana Medicare Advantage Gold Choice PFFS
  • Humana Medicare Advantage Gold Plus HMO
  • United Choice HMO (specialists only)
  • University of Chicago Health Plan (UCHP)

Our list of accepted insurance providers is subject to change at any time. You should contact your insurance company to confirm UChicago Medicine participates in their network before scheduling your appointment. If your insurance company is not listed here, or if you have any other questions, please contact Managed.Care@uchospitals.edu.

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