Meet the Staff of the Regional Kidney Stone Center

Leon Helmbrecht, MD Medical Director

Dr. Helmbrecht completed his Urology residency at university of Southern LA County USC Medical Center in 1975, and became board certified in urology in 1977.  He has been practicing in Pomona since 1975 and was one of the original urologists practicing at the Regional Kidney Stone Center’s grand opening.

Belen MacKenzie, RN Administrative Director


Varujan B. Anooshian

Diane S. Bertinotti

Erika Ordaz

Jang A. Woo

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