Ma Somsouk MD MAS

Gastrointestinal Cancer, Clinical Informatics

Professor of Medicine, UCSF School of Medicine

1001 Potrero Ave. 3DBox 0862San Francisco, CA 94110
Phone+1 628-206-8823
Fax+1 415-641-0745

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Summary

Dr. Ma Somsouk is a gastroenterologist in San Francisco, CA and is affiliated with multiple hospitals in the area, including Zuckerberg San Francisco General Hospital and Trauma Center and UCSF Medical Center. He received his medical degree from Harvard Medical School and has been in practice 15 years. He also speaks multiple languages, including Chinese (Mandarin). He specializes in gastrointestinal cancer and inflammatory bowel disease and is experienced in inflammatory bowel disease, ulcerative colitis, crohn's disease, interventional gastroenterology, and colonoscopy.

Education & Training

University of California at San FranciscoMAS, Epidemiology and Biostatistics, 2006 - 2008
University of California (San Francisco)Fellowship, Gastroenterology, 2005 - 2008
Los Angeles County-Harbor-UCLA Medical CenterResidency, Internal Medicine, 2002 - 2005
Harvard Medical SchoolClass of 2002

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Certifications & Licensure

CA State Medical License 2003 - 2027
American Board of Internal Medicine Gastroenterology

Clinical Trials

Fecal Microbiota Transplantation in HIV
COMPLETED
PHASE1

Publications & Presentations

PubMed

Detailed racial/ethnic disparities in hepatocellular carcinoma risk with an electronic health record-based cohort.
Mindy C DeRouen, Caroline A Thompson, Alison J Canchola, Alyssa Cortella, Terri Rice
Clinical Gastroenterology and Hepatology. 2026-08-04
Clinical Diagnosis Codes Identify Patients Unlikely to Receive Orders for Fecal Immunochemical Tests.
Andrew Tong Li, Shohei Burns, Dalia Martinez, Patricia Wang, Sona Aggarwal
Cancer Control. 2026-06-30
1 citations
Barriers to Timely Colonoscopy Completion Following Abnormal Fecal Immunochemical Test Results in a Safety-net System.
Leslie Avilez, Jeanette Wong, Kristan Olazo, Shreya Patel, Rena Pasick
Journal of General Internal Medicine. 2026-06-01

Journal Articles

Gut and Blood Differ in Constitutive Blocks to HIV Transcription, Suggesting Tissue-Specific Differences in the Mechanisms That Govern HIV Latency
Steven A Yukl, Ma Somsouk, Steven G Deeks, Sulggi Lee, Hiroyu Hatano, Peter W Hunt, Joseph K Wong, PLoS One
Macrophage Activation Marker Soluble CD163 Is a Dynamic Marker of Liver Fibrogenesis in HIV/HCV Coinfection
Ma Somsouk, Raymond T Chung, Steven Deeks, Annie J Kruger, Ricard Masia, Kathleen E Corey, Esperance A Schaefer, The Journal of Infectious Diseases

Press Mentions

Propofol Sedation for Colonoscopy: 2 Studies Evaluate Effect on Quality, CostAugust 18th, 2024
Colon Cancer Screening Kits Have a High Rate of Untestable SamplesNovember 18th, 2023
Colorectal Cancer Screening: How to Increase RatesJune 11th, 2024

Grant Support

IMProving Adherence to Colonoscopy through Teams and Technology (IMPACTT)UNIVERSITY OF CALIFORNIA, SAN FRANCISCO2022–2027
NRSA Training CoreUNIVERSITY OF CALIFORNIA, SAN FRANCISCO2016–2026
Modeling intestinal dysfunction in HIV infection with organoid technologyJ. DAVID GLADSTONE INSTITUTES2020–2024