Locations
Specialties
Medical School
Loyola University of Chicago
Internship
MacNeal Hospital
Residency
Loyola University Medical Center
Board Certification
Radiation Oncology
Hospital Affiliations
- Advocate Christ Medical Center
- Advocate South Suburban Hospital
- Advocate Trinity Hospital
- Ascension Saint Joseph Hospital
- Palos Hospital
Honors & Awards
- Named One of Chicago Magazine's Top Doctors in 2025
- Named One of Chicago Magazine's Top Doctors in 2024
Memberships & Affiliations
- American Society for Radiation Oncology
Biography
Dr. Crossan serves the practice as Medical Director for the Ascension St. Joseph’s Radiation Oncology office. Clinically, he’s interested in brachytherapy, radiopharmaceuticals and other specialty procedures.