Meet the Team

At Oklahoma Proton Center, we are dedicated to providing state-of-the-art proton therapy in a supportive environment that focuses not only on your treatment, but also on your overall well-being, so you can heal faster and get back to a normal life. The medical team is made up of radiation oncologists, nurses, radiation therapists, and treatment team assistants who are committed to providing exceptional patient care in a healing environment.

John Han-Chih Chang, MD, Medical Director, Clinical Research and Education

John Han-Chih Chang, MD

Undergraduate

University of Michigan
Ann Arbor, Michigan

Medical Degree

University of Michigan
Medical School
Ann Arbor, Michigan

Board Certification

American Board of Radiology in
Radiation Oncology

Residency

Radiation Oncology
University of Pennsylvania
Philadelphia, Pennsylvania

Teaching

Adjunct Associate Professor
University of Oklahoma Health Science Center
Department of Radiation Oncology 
Oklahoma City, Oklahoma

Andrew L. Chang, MD

Andrew Luke Chang, MD

Undergraduate

University of California
Riverside, California

Medical Degree

Loma Linda University
School of Medicine
Loma Linda, California

Residency

Radiation Oncology
Loma Linda University
Department of Radiation Medicine
Loma Linda, California

Board Certification

American Board of Radiology in
Radiation Oncology
Hospice and Palliative Care

Mark Storey, MD, Medical Director, Clinical Operations

Mark Storey, MD

Undergraduate

Vanderbilt University
Nashville, Tennessee

Medical Degree

University of Arkansas
for Medical Sciences
Little Rock, Arkansas

Residency

Radiation Oncology
The University of Texas MD Anderson Cancer Center
Houston, Texas

Board Certification

American Board of Radiology in Radiation Oncology

Leslie Yonemoto, MD

Leslie Yonemoto, MD

Undergraduate

University of California-Berkeley
Berkeley, California

Graduate Business Degree

Arizona State University
Tempe, Arizona

Medical Degree

Johns Hopkins University
School of Medicine
Baltimore, Maryland

Board Certification

American Board of Radiology in
Radiation Oncology (since 1996)

Residency

Radiation Oncology
Loma Linda University Medical Center
Loma Linda, California

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