Summary

Dr. Hallahan specializes in radiation oncology for lung cancer, gastro-intestinal cancer and breast cancer.

Quick Facts

  • 2.4
  • 42 years of experience
  • speaks English
  • University Of Chicago Medicine
  • 1 written review
  • 2 specialties
  • 19 areas of expertise
  • 2 board certifications
  • 6 hospital affiliations
  • 5 office locations
  • Male

Patients’ Perspective

  • Flexible scheduling

Office Locations

Dr. Dennis Eugene Hallahan has 5 locations

Alton Memorial Hospital

1 Memorial DrAlton, IL 62002

Christian Hospital

11133 Dunn RdSaint Louis, MO 63136

Missouri Baptist Medical Center

3015 N Ballas RdSaint Louis, MO 63131

Saint Louis Childrens Hospital

1 Childrens PlSaint Louis, MO 63110

Barnes Jewish Hospital

1 Barnes Jewish Hospital PlzSaint Louis, MO 63110

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Dr. Dennis Eugene Hallahan, MD
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Dr. Dennis Eugene Hallahan, MDDr. Andrew J HopeDr. Douglas Michael LublinDr. Ernie Glen Williamson
Radiation OncologyRadiation OncologyPathologyPublic Health & General Preventive Medicine
2.4 
42 Years of Experience 44 Years of Experience 21 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English Speaks English
Alton , ILSaint Louis , MOSt. Louis , MOSaint Louis , MO
Med School: Rush Medical College Of Rush University Medical Center Med School: David Geffen School Of Medicine At Ucla Med School: St Louis University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Dennis Eugene Hallahan

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Dennis Eugene Hallahan has the following 2 specialties

Specialty Expertise

Dr. Dennis Eugene Hallahan has the following 19 areas of expertise

  • Breast Cancer
  • Cancer
  • Gastrointestinal Cancer
  • Gene Therapy
  • Head and Neck Cancer
  • Hodgkin Disease
  • Hodgkin's Lymphoma
  • Internal Medicine
  • Lewis Lung Carcinoma
  • Local Neoplasm Recurrence
  • Lung Cancer
  • Prostate Cancer (Prostatic Neoplasm)
  • Radiation Therapy
  • Radioimmunotherapy
  • Skin Cancer (Experimental Melanoma)
  • Soft Tissue Cancer (Sarcoma)
  • Squamous Cell Carcinoma
  • Throat Cancer (Laryngeal Neoplasm)
  • Urogenital Cancer (Genitourinary)

Certifications, License, & Education

42 Years Experience

Dr. Dennis Eugene Hallahan holds active and expired medical licenses in the states of Illinois and Missouri.

Medical License

Medical Doctor with an active medical license in the state of Illinois that expires in 2026 and an expired medical license in the state of Missouri that expired in 2026.

Education & Training

Residency

Completed their residency at University Of Chicago Medicine.

Medical School

Graduated from Rush Medical College Of Rush University Medical Center in 1984.

NPI Number

Dr. Hallahan's NPI number is 1699867010.

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Frequently Asked Questions

Is Dr. Dennis Hallahan accepting new patients?
Dr. Dennis Hallahan has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Does Dr. Dennis Hallahan accept my insurance?
You can see the insurance plans that Dr. Dennis Hallahan accepts on their Vitals profile.
Which hospitals is Dr. Dennis Hallahan affiliated with?
Dr. Dennis Hallahan is affiliated with Barnes Jewish West County Hospital, Alton Memorial Hospital, Barnes Jewish Hospital, Christian Hospital, Missouri Baptist Medical Center, and Saint Louis Childrens Hospital.
Where is Dr. Dennis Hallahan's office located?
Dr. Dennis Hallahan's office is located at 1 Memorial Dr, Alton, IL, 62002.
Does Dr. Dennis Hallahan accept virtual/telehealth appointments?
Dr. Dennis Hallahan has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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