Locations and Physicians

Robert Gin, MD

Patient Portal


Radiation Oncology


Tucson - St. Mary’s Radiation Oncology
1620 W. St. Mary's Road
Tucson, AZ 85745
Phone: (520) 791-7996
Fax: (520) 791-3329

Green Valley - Radiation Oncology
1315 S. La CaƱada Drive
Green Valley, AZ 85622
Phone: (520) 625-9850
Fax: (520) 625-8467

Robert Gin, MD


University of Arizona

Medical School

University of Arizona Medical School


Good Samaritan Hospital


University of Arizona

Board Certification

Radiation Oncology


Dr. Gin practices radiation oncology with a special interest in breast and head and neck malignancies. He is experienced in the diagnosis and treatment of all soft tissue cancers such as breast, prostate, and lung cancer. Dr. Gin is also active in the use of intensity modulated radiation therapy (IMRT) and image guided radiation therapy (IGRT) of adult cancers.
While earning his Bachelor of Science degrees in Chemistry and Molecular and Cellular Biology from the University of Arizona, Dr. Gin also earned membership in the academic honors society, Phi Beta Kappa. He served as Chief Resident while completing his residency in radiation oncology at the University of Arizona.




Outside of work, Dr. Gin enjoys spending time with his wife Rebekah and their two children. He also enjoys cycling, running, and hiking.


  • American College of Radiology
  • American Society for Radiation Oncology
  • St. Mary's Breast Center Steering Committee