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1321 Cottonwood St3rd floorWoodland, CA 95695
Phone+1 530-668-2600
Dr. Umphress is on Doximity
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Education & Training
University of California Davis HealthFellowship, Gastroenterology, 2002 - 2005
University of Texas Health Science Center at HoustonResidency, Internal Medicine/Pediatrics, 1995 - 1999
University of California San Diego School of MedicineClass of 1995
Certifications & Licensure
TX State Medical License 1997 - Present
CA State Medical License 1997 - 2025
HI State Medical License 1998 - 1998
American Board of Internal Medicine Gastroenterology
Publications & Presentations
PubMed
- 25 citationsBiliary stricture caused by portal biliopathy: diagnosis by EUS with Doppler USJason L. Umphress, R. Erick Pecha, Shiro Urayama
Gastrointestinal Endoscopy. 2004-12-01 - 4 citationsA membrane-bound protein kinase from rabbit reticulocytes is an active form of multipotential S6 kinase.Eric S. Bensen, Jason L. Umphress, Jolinda A. Traugh, Lorenzo A. Pinna, Polygena T. Tuazon
Biochimica Et Biophysica Acta. 1996-02-08 - 24 citationsDeterminants on simian virus 40 large T antigen are important for recognition and phosphorylation by casein kinase I.Jason L. Umphress, Polygena T. Tuazon, Charng-Jui Chen, Jolinda A. Traugh
European Journal of Biochemistry. 1992-01-01
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