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Oncology Specialist (cancer)
37 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. William O'Reilly:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. William O'Reilly is Poor. Dr. O'Reilly has been reviewed by 1 patients who have provided 1 comments. The rating is 1 out of 5 stars.

Patient Ratings
Ease of Appointment 1.0
Promptness 1.0
Courteous Staff 1.0
Accurate Diagnosis 1.0
Bedside Manner 1.0
Spends Time with Me 1.0
Follows Up After Visit 1.0

Specialties & Research

Dr. William O'Reilly, MD is board certified in Medical Oncology.

  • He has special expertise in 1 area:
  • Cancer

Education & Awards

Dr. O'Reilly graduated from Loyola University Chicago, Maywood. He has 1 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. O'Reilly has 3 hospital affiliations:

  • Palos Community Hospital 
  • Little Company Of Mary Hospital 
  • Silver Cross Hospital 


  • French

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Additional Information
Dr. William Sean O'Reilly MD is a male Oncologist , has 37 years of experience and practices in Medical Oncology.
Where does Dr. William S. O'Reilly practice?
Dr. William O'Reilly has 1 office location.
Dr. William O'Reilly practices Medical Oncology near Palos Heights, IL.
See Palos Heights Oncologists.