People

Chuck Mcculloch, PhD, MS, MA

Co-Investigator
IMPACTT

I am an Emeritus Professor of Biostatistics. I have expertise in the development and use of statistical methods for longitudinal data analysis, mixed models and latent class models. I am the co-author of the Wiley texts Variance Components and Generalized, Linear, and Mixed Models (now in its second edition), the Springer text Regression Methods in Biostatistics (now in its second edition) and the author of the Institute of Mathematical Statistics monograph, Generalized Linear Mixed Models.

Kristan Olazo, MPH

Project Manager
IMPACTT

Rena Pasick, DrPH, MPH, MA

Co-Investigator
IMPACTT

Dr. Pasick is Professor of Medicine at UCSF. From 2002-18 she served as Director of the Office of Community Engagement for the UCSF Helen Diller Family Comprehensive Cancer Center. Trained in public health with a DrPH from UC Berkeley, Dr. Pasick has spent the past thirty years conducting research on cancer disparities in the diverse and underserved communities of the San Francisco Bay Area.

Urmimala Sarkar, MD, MPH

Co-Principal Investigator
IMPACTT

Urmimala Sarkar MD, MPH is Professor of Medicine at UCSF in the Division of General Internal Medicine, Associate Chair for Faculty Experience for the Department of Medicine, Associate Director of the UCSF Center for Vulnerable Populations, and a primary care physician at Zuckerberg San Francisco General Hospital’s Richard H. Fine People's Clinic. Dr. Sarkar’s work centers on innovating for health equity and improving the safety and quality of outpatient care for everyone, especially low-income and diverse populations.

Justin Sewell, MD, PhD, MPH

Co-Investigator
IMPACTT

CLINICAL ACTIVITIES:
I provide clinical care at Zuckerberg San Francisco General Hospital, where I specialize in caring for patients with inflammatory bowel disease (IBD), including Crohn’s disease and ulcerative colitis. I also see patients with any gastroenterological disease and perform endoscopic procedures, including upper endoscopy and colonoscopy. Additionally, I am the Medical Director for the Gastroenterology Division at ZSFG.

Ma Somsouk, MD, MAS

Co-Principal Investigator
IMPACTT

1. Leverage electronic health data to implement novel population health services and care coordination for complex populations. We embrace big data and technology to design, develop, and deliver economic and effective services for patients in the area of cancer screening and follow-up.

Jeanette Wong

Project Staff
IMPACTT