Leonard S. Marks, MD

Leonard S. Marks, MD

Urology| Urologic Oncology
Primary Location
Westwood Urology
200 Medical Plaza
Los Angeles, California 90095


Professor and deKernion Endowed Chair in Urology, Dr. Marks received his medical degree from the University of Texas, graduating with AOA honors and a Masters of Arts in Physiology in 1969. He was named a Fellow and Post-Doctoral Research Scholar at UCLA School of medicine and completed his residency at UCLA. Dr. Marks's current research focuses on improving prostate cancer diagnostic measures and outcomes; exploring and assessing efficacy of active surveillance and various focal therapy treatments, including cryoablation, HIFU, and FLA for primarily low- to intermediate-risk prostate cancer. He is an authority in targeted MRI fusion prostate biopsy and has authored more than 120 peer-reviewed scientific publications on prostate research.

Academic Appointments:

  • Professor and DeKernion Endowed Chair in Urology
  • Professor in-Residence – UCLA Medical Center, Los Angeles, CA

    Professional Memberships:
  • American Urological Association


Medical Board Certification

Urology, American Board of Urology, 1980


UCLA School of Medicine, 1978
Harbor - UCLA Medical Center, 1973


Harbor - UCLA Medical Center, 1970


University of Texas Medical Branch at Galveston, MD, 1969

Hospital Affiliations

Ronald Reagan UCLA Medical Center

Areas of Focus

Mri trus fusion guided prostate biopsy
Active surveillance of prostate cancer
Prostate cancer
Prostate cancer cryotherapy


MRI/Ultrasound Fusion for Prostate Biopsy | #UCLAMDChat Webinar
UCLA Offers HIFU Treatment for Recurrent Prostate Cancer


  • Top Doctors, Los Angeles Magazine, 2021