Joseph M Caster portrait

Joseph M. Caster, MD, PhD

Radiation Oncologist
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Assistant Professor

Radiation Oncology ( )


The most gratifying thing about my job is that it gives me an opportunity to help people navigate through one of the most difficult situations they will ever face. As if a cancer diagnosis were not frightening enough, cancer treatment is very complicated and frequently it is just as scary as the cancer its self. My team and I work with cancer patients every day and we take great pride in making the process of cancer treatment as simple and painless as possible.

Holden Comprehensive Cancer Center Programs


Adult Specialties

  • Radiation oncology

Special Procedures

  • Brachytherapy

Diseases and Conditions

  • Cervical cancer
  • Colorectal cancer
  • Endometrial cancer
  • Esophageal cancer
  • Gastrointestinal cancer
  • Pancreatic cancer
  • Stomach cancer


200 Hawkins Drive
Iowa City, IA 52242



  • BS, Biochemistry, Florida State University, Tallahassee, Fla.
  • PhD, Pharmacology, Duke University, Durham, N.C.
  • MD, University of North Carolina, Chapel Hill, N.C.


  • Internal Medicine- Preliminary, University of North Carolina, Chapel Hill, N.C.
  • Radiation Oncology, University of North Carolina, Chapel Hill, N.C.

Cancer Research Member

Cancer Research Program

Program 2: Experimental Therapeutics (ET)

Cancer Center Membership Status

Associate Member

Cancer Department

Radiation Oncology