John N. Mafi, MD, MPH

John N. Mafi, MD, MPH

  • Internal Medicine
Westwood Internal Medicine 200 | 200 Medical Plaza, Suite 420, Los Angeles, CA 90095


John N. Mafi, MD, MPH is an associate professor of medicine in the Division of General Internal Medicine and Health Services Research at the David Geffen School of Medicine at UCLA where he also practices and teaches primary care and inpatient geriatrics. He also serves as an Affiliated Adjunct Physician Policy Researcher in Health Policy at RAND Corporation. Dr. Mafi completed his undergraduate studies at Northwestern University and then went on to complete medical school at Case Western Reserve University. He then finished his internal medicine residency training at Beth Israel Deaconess Medical Center in 2012, where he also served as Chief Medical Resident in 2013-2014. Dr. Mafi completed the Harvard Medical School Fellowship in General Internal Medicine and Primary Care at Beth Israel Deaconess Medical Center and earned his MPH at the Harvard T.H. Chan School of Public Health in 2015.
During his career at UCLA, Dr. Mafi has obtained NIH funding as principal investigator, including an NIA R01 award and K76 Beeson Emerging Leaders Career Development Award in Aging, to study and address the problem of harmful medical overuse among older Americans. He has led several national analyses assessing the epidemiological trends of medical overuse, or patient care that provides no net benefit in specific clinical scenarios, such as antibiotic prescriptions for common cold viruses. Dr. Mafi is currently leading several national studies on medical overuse among older Americans as well as initiatives using electronic health records to measure and improve the value of healthcare delivery among older adults in Los Angeles.




Medical Board Certification

Internal Medicine, American Board of Internal Medicine, 2012


Internal Medicine, Beth Israel Deaconess Med Ctr-East Campus, 2012


Internal Medicine, Beth Israel Deaconess Med Ctr-East Campus, 2010


MPH, Harvard School of Public Health, 2015
MD, Case Western Reserve Univ School of Medicine, 2009

Hospital Affiliations

Ronald Reagan UCLA Medical Center

UCLA Santa Monica Medical Center

Areas of Focus



  • Quality of care, value, innovation, and policy.


  • Aetna
  • Anthem Blue Cross
  • Blue Shield of California
  • Centivo
  • Cigna
  • First Health
  • Health Net of California
  • Interplan (part of HealthSmart)
  • L.A. Care
  • MultiPlan
  • UFCM Health System
  • Prime Health Services
  • Private Healthcare Systems (PHCS)
  • UnitedHealthcare

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