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Guillermo Gonzalez-Osete, MD

Medical Oncologist / Hematologist

Dr. Gonzalez-Osete's
Office Locations

Guillermo Gonzalez-Osete, MD

Dr. Gonzalez-Osete who is board-certified in both medical oncology and internal medicine, received his fellowship training in hematology and oncology at the Arizona Cancer Center in Tucson. Following the completion of his fellowship, he served as Clinical Assistant Professor of Medicine at the Arizona Cancer Center, and during that time, he was part of the bone marrow transplant team.

He treats breast, lung, and other cancer types. In addition to his practice in Tucson, he also cares for patients at our Green Valley clinic.

Dr. Gonzalez-Osete has co-authored several book chapters and has multiple publications. He was actively involved for many years with ¡VIDA!, the Annual Mujer Latina Breast Cancer Conference.

He currently serves as Hematology & Oncology Section Chairman for St. Mary’s Carondelet Hospital and as Blood Transfusion Committee Chairman at St. Mary’s Hospital.


Nogales Federal Preparatory School

Medical School:

Universidad Autonoma of Guadalajara, Inc.


Hermosillo General Hospital


Hospital Espanol de Mexico


Medical Oncology and Hematology, University of Arizona Cancer Center

Board Certification:

Medical Oncology and Internal Medicine