Dennis E. Hallahan

Dennis E. Hallahan, MD, FASTRO

Specializes In
  • Radiation Oncology
Referral Type

Not Accepting New Patients

Languages Spoken
  • English


Sees Patients For

Brain tumors, cancer of the central nervous system, cancer antibody development, immunotherapy, cancer drug development, radiation protecting drugs, nanoparticles, cancer drug delivery gene therapy for cancer

Hospital Affiliations

  • Barnes-Jewish Hospital



Board Certifications

  • Therapeutic Radiology

Academic Title(s)

Chairman, Radiation Oncology
Elizabeth H. and James S. McDonnell III Distinguished Professor in Medicine

Research Interests

Identification of new molecular targets for cancer therapy, drug development to improve cancer response to radiation therapy while minimizing the effect on normal tissues. Also drug development to protect tissues from radiation, antibody development and the use of nanoparticles for drug delivery

Publications & Research

View research profile »


Postdoctorate Basic Science Research

1990 Radiation and Cellular Oncology, University of Chicago Medical School, Chicago, IL

B.S. (Biology)

1980 University of Chicago, Chicago, IL

Medical School

1984 Rush University, Chicago, IL


1986 Internal Medicine, University of Chicago Medical School, Chicago, IL


1989 Radiation Oncology, University of Chicago Medical School, Chicago, IL

Financial Disclosures
  • Medical Guidance
    • Equity: Yes
    • Reporting Date: 05/01/2023

Washington University and its physicians and health professionals are committed to ensuring integrity and objectivity in medical decision-making. Some of our physicians and health professionals work collaboratively with pharmaceutical, medical device or other medical care related companies to develop innovative ideas and products that can improve health care delivery and clinical outcomes for patients. In some instances, our physicians and health professionals have an ownership or potential ownership interest in a commercial company; and/or are paid by a commercial company to provide advice on product design or to speak about the use of medications, devices, equipment or procedures. These payments may include: a) compensation for consulting and speaking engagements, b) equity, and/or c) royalties for products invented by our faculty. Any payments to Washington University physicians or health professionals must be based on tangible services and may not exceed fair market value for their work. In addition to disclosure on this website, physicians and health professionals earning more than $10,000 per year must disclose their corporate financial relationship in writing to patients when prescribing or using that company's products.