John R. Yuen

John R. Yuen, PharmD, BCNP

Board Certified Nuclear Pharmacist, LAC+USC Medical Center - Radiopharmacy

Adjunct Associate Professor of Pharmacy Practice

Clinical Pharmacy

Research Topics

  1. Nuclear Pharmacy
  2. Radiological Global Threat Reduction
  3. Oncological Pharmacy
  4. Infectious Disease Pharmacy
  5. Ophthalmological Pharmacy

Contact Information

  • LAC+USC Medical Center
    D&T Bldg., 4th Floor, Room 4D331
    Los Angeles, CA 90033
  • 323-409-7861


A.A., Pre-Psychology, Pasadena City College, 1982
B.A., Psychology, University of Southern California, 1984
Pharm.D., University of Southern California School of Pharmacy, 1988

John R. Yuen


A Board Certified Nuclear Pharmacist with over thirty years of specialty practice and clinical research within hospital, clinic, industry, and academic settings. A Retired U.S. Army Officer with over twenty years honorable service in the Medical Service Corps. A Community volunteer for over twenty years to those suffering from despair, homelessness, emergency, and disaster. A sincere focus and determination to glorify God through helping others in their need.

Education and Training:

Dr. Yuen began his science career as a neurobiology research aide at Caltech in 1980 while he completed his Pasadena Community College A.A. degree in 1982. He then enlisted into the U.S. Army and continued his undergraduate studies at USC under a U.S. Army ROTC Scholarship with simultaneous membership in the California Army National Guard. During this time, he first heard about nuclear pharmacy and he met one of its finest pioneers, Dr. Walter Wolf. At age 19, he completed his Pre-Pharmacy studies with a B.A. in Psychology and he was commissioned as a U.S. Army Medical Service Corps Officer. Shortly thereafter, he discharged from Army Active Duty and transferred into the Army Reserve to pursue his Pharm.D. at the USC School of Pharmacy. His passion for nuclear pharmacy and the patients we serve was on high. During those formative years in becoming a clinical nuclear pharmacist, he completed a Hospital Internship - City of Hope (1988), the USC Advanced Pharmacy Practice Experience Clerkship in Nuclear Pharmacy - LAC+USC Medical Center (1988), an Ambulatory Care Residency - V.A. Los Angeles Medical Clinic (1989), a Clinical Ocular Pharmacology Fellowship - Doheny Eye Institute/Allergan, Inc./USC Schools of Medicine and Pharmacy (1990), and an Infectious Diseases Pharmacotherapy Fellowship - LAC+USC Medical Center/USC School of Pharmacy (1991). All the while, he furthered his clinical acumen as a consultant and per diem pharmacist at several leading local teaching hospitals and continued to serve here and overseas in the Army Reserve.

On Nuclear Pharmacy:

Dr. Yuen has charge of the Radiopharmacy Service at the LAC+USC Medical Center, a flagship operation in the specialty field of Nuclear Pharmacy that provides over 5,000 radiopharmaceutical doses each year and was inspired and originated by his great friend and mentor, the late USC Distinguished Professor Walter Wolf, Ph.D. in 1970. He has been board certified since 1994 with the Board of Pharmacy Specialties as founded by the American Pharmacists Association. His nuclear pharmacy experience includes work and research in industry at Syncor International Corporation, charge of the nuclear pharmacy service at Kaiser Permanente Los Angeles Medical Center, and the same charge at his current employer under the Los Angeles County Department of Health Services. He has been an adjunct professor with five universities since 2000 and continues the legacy of Dr. Wolf's USC Nuclear Pharmacy Clerkship as its professor and preceptor. He has served as an advisor and an editor for board recertification continuing education programs with the University of New Mexico and Purdue University since 2002 as well as a subject expert on local, state, and national levels. He is enlightened by Dr. Wolf's vision imparted at the time they began directly working together again in 2010: "40+ years later, it is good to see that the field is advancing again. Now it is up to us to open a new frontier."