Radiation Oncology

Dziemianowicz, Mark S., MD

Accepting New Patients

Dr. Mark Dziemianowicz is a radiation oncologist with Cheyenne Regional Medical Center’s Cancer Center. Dr. Dziemianowicz earned his undergraduate degree from the University of Pennsylvania and his medical degree (M.D.) and master’s in business administration (M.B.A.) from Temple University in 2016. He completed residency training in radiation oncology at Wayne State University/Karmanos Cancer Institute in 2021, an NCI-designated Comprehensive Cancer Center.

Dr. Dziemianowicz has five years of experience working in radiation oncology. He is interested in treating cancers of the breast, lung, central nervous system, head & neck, gastrointestinal system, genitourinary system, lymphoma, sarcoma, and other malignancies and benign tumors. He is a member of the American Society for Radiation Oncology, American College of Radiation Oncology, and American Brachytherapy Society. He has numerous publications in peer-reviewed journals and regularly presents at national conferences. He won the 2020 Roentgen Award for excellence in research at Karmanos Cancer Institute and has won several other local and national awards for his work on breast and cervical cancer.

Personal Interests

Dr. Dziemianowicz resides in Cheyenne, Wyoming with his wife and two young children. He enjoys volunteering, hiking, cycling, skiing, traveling and spending time enjoying the outdoors with his family.


Cancer Services

Complete chemotherapy, radiation and medical oncology treatment, infusions, lab work and complementary therapy at one comfortable, welcoming location.

Monday - Thursday: 7:30 a.m. - 4:30 p.m.
Friday: 7:30 a.m. - 4 p.m.