Dr. Gretzer graduated from the University of Texas Medical School at San Antonio in 1998. He works in Tucson, AZ and 1 other location and specializes in Urology and Hematology/Oncology. Dr. Gretzer is affiliated with Banner University Medical Center and Banner University Medical Center South Campus.
Medical School: University of Texas Medical School at San Antonio; Graduated 1998
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*This physician has multiple office locations. See Office Information for details.