Our Team
Sumant Ranji, MD
Director, UCSF CODEX
Professor of Clinical Medicine, Zuckerberg San Francisco General Hospital Division of Hospital Medicine
Sumant brings more than 20 years of experience in patient safety, quality improvement, and medical education to CODEX. He first joined UCSF as a fellow in hospital medicine and clinical research, then went on to become a faculty member in the Division of Hospital Medicine at UCSF Health, where he held multiple leadership positions. Sumant then assumed the position of chief of the Division of Hospital Medicine (DHM) at the Zuckerberg San Francisco General Hospital (ZSFG) from 2016-2023. He now concurrently serves as the director of quality improvement and patient safety.
Learn more about Sumant here.
Anjana Sharma, MD, MAS
Learning Hub Faculty Lead, UCSF CODEX
Associate Professor, UCSF Department of Family and Community Medicine
Anjana brings a wealth of experience in patient safety, quality improvement, patient engagement, medical education, and health equity. As a primary care physician and researcher, she has spent numerous years studying patient safety in primary and ambulatory care, researched strategies to prevent diagnostic and medication errors, and developed interventions to improve patient engagement in medical care. She also teaches evidence-based medicine and patient involvement in practice improvement to the UCSF Family and Community Medicine Residency Program at ZSFG.
Learn more about Anjana here.
Benjamin Rosner, MD, PhD, FAMIA
Action Incubator Faculty Lead, UCSF CODEX
Clinical Professor, UCSF Division of Clinical Informatics and Digital Transformation (DoC-IT)
Ben is a nationally recognized researcher and entrepreneur in digital health who combines industry experience with pragmatic study design. His research focuses on feedback to physicians and health systems about their performance including performance on optimal use of the electronic health record, diagnostic performance (see GoodDx.org), and performance related to the implementation of digital health tools.
Learn more about Ben here.
Caroline Jens, MPH
Project Manager, UCSF CODEX
Caroline comes to CODEX from the Gordon and Betty Moore Foundation, where she supported the Diagnostic Excellence Initiative and its recent conclusion.
Molly Hammer, PhD
Project Manager, UCSF CODEX Learning Hub
Molly is an education researcher with a background in evaluating educational interventions, communicating scientific findings to educators and policymakers, and learning with technology.
Mika Rivera, MPS
Director of Communications, UCSF CODEX
Mika brings a wide range of writing, branding, and dissemination expertise from previous roles with UCSF's development department, the Smithsonian, and various private and public sector organizations.
Lorri Zipperer
Cybrarian and Content Strategist, UCSF CODEX
Lorri was a founding staff member of the National Patient Safety Foundation (NPSF). She has been monitoring the published output of the patient safety movement since 1997, most notably as the content curator for the AHRQ Patient Safety Network for 20 years. Her editorial work has produced books and articles on topics including diagnostic improvement, patient safety, resilience engineering, and systems thinking. Lorri is an American Hospital Association/NPSF Patient Safety Leadership Fellowship alumnus and an Institute for Safe Medication Practices (ISMP) Cheers award winner.
Blen Gebremeskel, MD
Summer Project Intern, UCSF CODEX
MPH Candidate in Health Policy & Management, UC Berkeley School of Public Health
Mastercard Foundation Scholar
A physician and researcher from Ethiopia, with experience in healthcare operations in Los Angeles, Blen is currently pursuing her Master's in Public Health at UC Berkeley with a concentration in health policy and management. She brings a unique blend of clinical experience, healthcare operations expertise, and public health training to our team.