Marlon A. Guerrero, MD, FACS

Associate Professor, Surgery
Associate Professor, Otolaryngology
Vice Chair of Quality and Performance

Marlon Guerrero, MD, FACS, is an associate professor in the Division of General Surgery, Section of Surgical Oncology and vice chair of quality and performance in the Department of Surgery at the University of Arizona.

Dr. Guerrero received his BS in Biology from California State University, East Bay after graduating cum laude. He earned his medical degree from Meharry Medical College in Nashville, TN, where he was elected into the prestigious Alpha Omega Alpha Honor Medical Society. He completed his general surgery residency at the Michael E. DeBakey Department of Surgery at the Baylor College of Medicine in Houston, TX. There, he was awarded the St. Luke's Hospital Resident of the Year award in 2005.

Dr. Guerrero became interested in treating endocrine tumors and disorders after his training at the MD Anderson Cancer Center. He entered a prestigious endocrine surgery fellowship at the University of California, San Francisco under the mentorship of the legendary Dr. Orlo H. Clark. He joined the Department of Surgery at the University of Arizona in July 2009 as director of endocrine surgery and holds many adjunct positions within the College of Medicine.

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  • MD: Meharry Medical College, 2003
  • BS, Biology: California State University East Bay
Baylor Medical College, General Surgery, 2003-2008
University of California San Francisco, Endocrine Surgery, 2008-2009
Board Certifications
American Association of Endocrine Surgeons Certificate
American Board of Surgery - Diplomate, Endocrine Surgery
Honors and Awards
College of Medicine – Tucson Faculty Teaching Award, Dean’s List for Excellence in Teaching, 2015
Resident of the Year Award, St. Luke's Hospital, 2005
Endocrine Surgery
Thyroid Nodules
Thyroid Cancer
Thyroid Neoplasms
Parathyroid Diseases
Neuroendocrine Tumors of the Pancreas
Cushing's Syndrome
Adrenal Tumors
Adrenal Cortical Cancer
Gastrointestinal Neuroendocrine (Carcinoid) Tumors