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Dr. Jonathan H. Watanabe

Post-Acute Care Outcomes, Adherence Research. Health Disparities Research

Jonathan H. Watanabe

Jonathan H. Watanabe, Pharm.D., M.S., Ph.D. BCGP

Associate Professor of Clinical Pharmacy
Skaggs School of Pharmacy and Pharmaceutical Sciences


(858) 822-1069

Research Summary: Post-Acute Care Outcomes, Adherence Research. Vulnerable Populations Research

Dr. Watanabe seeks to determine factors that jeopardize appropriate medication use. Dr. Watanabe practices in Post-Acute Care Pharmacy and focuses on outcomes in older adults and residents of extended care facilities. He has completed investigations on 1) the role of adherence on surrogate markers for chronic conditions; 2) the effect of copayment and copayment pricing on adherence; 3) the impact of polypharmacy on adherence; 4) the role of pharmacy benefit on health services utilization; 5) methods used in health services research applying large national data; 6) new thresholds for categorizing adherent status.

Collaborating with an interdisciplinary care team, Professor Watanabe initiated longitudinal assessments of outcomes in Post-Acute Care Settings and characterized those at risk for poor adherence and compromised health outcomes in Veterans with chronic diseases. He has served as an invited speaker at several international forums devoted to improving care for seniors in long term care settings and provided presentations on pharmacy benefit and evaluation at the National Academy of Sciences. He currently trains students, post-docs, and practitioners in multiple disciplines in clinical research and post-acute care.

Professor Watanabe is a clinical consultant at the Program of All-inclusive Care for the Elderly (PACE) Clinic in San Ysidro, CA and the Villa Pomerado Skilled Nursing Facility in Poway, CA . He is an investigator on the Health Resources and Services Administration funded San Diego Geriatrics Workforce Enhancement Program Grant. Dr. Watanabe was the inaugural recipient of the University of Washington/Allergan Health Economics and Outcomes Research Fellowship. Watanabe serves as the faculty advisor for the Academy of Managed Care Pharmacy student chapter. He is a Board Certified Geriatric Pharmacist (BCGP).

Academic Achievements


B.S. in Zoology (University of Washington); Pharm.D. (University of Southern California); M.S. (University of Washington); Ph.D. (University of Washington).

Awards and Honors:

National Academy of Medicine Pharmacy Fellow (2016-2018). National Institutes of Health Loan Repayment Program Investigator (National Institute on Aging). Gold Award for top abstracts Academy of Managed Care Pharmacy Annual Meeting (2017). UC San Diego and You Speaker 2016 


  • Biostatistics (SPPS 206)
  • Introduction to Healthcare Systems and Policy (SPPS 207)

Key Contributions to Pharmaceutical Sciences

  • Enhanced understanding of adherence on clinically validated outcome measures in chronic diseases.
  • Proposed alternative adherence threshold based on robust outcomes assessment.
  • Quantified role in appropriate medication use and emergency department visits.
  • Applied outcomes research framework to Long Term Care Pharmacy practice
  • Quantified association between medication use and falls in older adults.

Selected Recent Publications (view more)