UCI Health will see you now: Welcome to our new co-workers and patients from Fountain Valley, Lakewood, Los Alamitos and Placentia Linda! 

Dr. Mo Ziari, a board-certified UCI Health hematologist and medical oncologist, wearing a whitecoat.

Mohammadbagher Ziari, MD



Nickname: Mo
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  • American Board of Internal Medicine, Hematology
  • American Board of Internal Medicine, Medical Oncology
  • English
Forest park Hospitalinternal medicine
SLUInternal Medicine
UTSWHematology and Oncology
Professional Positions
  • Professor — Division of Hematology/Oncology, Department of Medicine, UCI School of Medicine
More Information

Dr. Mohammadbagher (Mo) Ziari is a board-certified UCI Health hematologist and medical oncologist who specializes in the diagnosis, treatment and management of solid tumors as well as benign and malignant hematological conditions. 

He earned his medical degree at Shiraz University of Medical Sciences in Shiraz, Iran. Next, he completed a residency in internal medicine at Saint Louis University School of Medicine in Saint Louis, Mo., followed by fellowship training in hematology and oncology at the University of Texas Southwestern in Dallas.

Ziari delivers leading-edge cancer therapies, including chemotherapy, endocrine therapy, targeted therapy, monoclonal antibodies and immunotherapy. He is the author of numerous peer-reviewed journal articles.

He sees patients in Costa Mesa and Orange.

UCI Health Chao Family Comprehensive Cancer Center
101 The City Drive South, Building 23
Orange, CA 92868
Phone: 714-456-8000
Fax: 855-211-3729
UCI Health Chao Family Comprehensive Cancer Center — Costa Mesa
1640 Newport Blvd., Suites 400, 450 & 455
Costa Mesa, CA 92627
Phone: 714-456-8000
Fax: 949-999-2405