Cancer & Infusion Center Providers

Philip Colletier, MD

Graduate of: 

University of Illinois

Rush Medical College of Medicine

Residency Location:

Internship - Letterman Army Medical Center - San Francisco

Residency in Radiation Oncology - M.D. Anderson Cancer Center, Houston

Certified in:

Radiation Oncology - American Board of Radiology

Richard Deming, MD

Graduate of: 

South Dakota State University

Creighton University - School of Medicine

Residency Location:

Internship in Internal Medicine - Naval Regional Medical Center, San Diego

Residency in Radiation Oncology - University of California, San Francisco

Certified in:

Radiation Oncology - American Board of Radiology

Kimberly Hendricks, DO

How do you want to make an impact at Greater Regional Health?

I want to start a rheumatology service line that will be beneficial to the community.

What is your philosophy statement?

Every patient is different and it requires teamwork to achieve health and wellness.

What made you want to be in the medical field?

I watched my grandmother struggle with rheumatoid arthritis and I wanted to make a difference.

What do you enjoy doing in your free time?

Running half marathons, cooking, spending time with family, friends and pets.

Bradley Hiatt, DO

Graduate of: 

Grandview College - Des Moines

Des Moines University - College of Medicine

Residency Location:

Residency in Internal Medicine - University of Iowa, Iowa Methodist Medical Center

Fellowship in Medical Oncology and Hematology - University of Iowa Hospitals and Clinics

Certified in:

Internal Medicine - American Board of Internal Medicine

Medical Oncology - American Board of Internal Medicine

John Martens, MD

Graduate of: 

University of Nebraska

University of Nebraska - College of Medicine

Residency Location:

Internship - Iowa Methodist Internal Medicine

Residency - University Hospital - Cincinnati, Ohio (Chief Resident)

Certified in:

Radiation Oncology - American Board of Radiology

Dev Puri, MD

Graduate of: 

Stanford University

University of California - College of Medicine

Residency Location:

Residency in Radiation Oncology - Memorial Sloan-Kettering Cancer Center, New York

Certified in:

Radiation Oncology - American Board of Radiology

Christian Schultheis, MD, FACP

Graduate of: 

Loras College

American University of the Caribbean Medical School

Residency Location:

Residency in Internal Medicine - University of Oklahoma

Fellowship in Medical Oncology and Hematology - University of Missouri - Columbia

Certified in:

Board Certified in Medical Oncology

Board Certified in Hematology

George Voynov, MD

Graduate of: 

Connecticut College

University of Connecticut - College of Medicine

Residency Location:

Internship in Internal Medicine- Thomas Jefferson University

Residency in Radiation Oncology - University of Pittsburgh

Certified in:

Radiation Oncology - American Board of Radiology

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1700 W. Townline St.

Creston, Iowa 50801

(641) 782-7091

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Videographer: Dustin Baird

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