OUR PROVIDERS

BEMG has been staffing the Emergency Departments of Alta Bates for over 30 years and the Summit campus since 2004.

We are dedicated to providing the best care for our patients in their time of need. Many of our physicians and mid-level providers are on hospital committees to ensure that communication within all the hospital departments are fluid, and our departments provide the highest quality care and operate efficiently.

Leadership Team

Steve M. Sornsin, MD

Steve M. Sornsin, MD

Chief Executive Officer

Steve M. Sornsin, MD graduated from Ohio State University School of Medicine in 1983 and Denver General Hospital (now Denver Health System) Emergency Medicine Residency Program in 1987. He has been with BEMG since 1995.

Brian Potts, MD

Brian Potts, MD

Medical Director, Alta Bates Campus

Brian Potts, MD graduated from UC-Irvine School of Medicine in 2004 with a MD-MBA combined degree with Distinction in Service. He completed Emergency Medicine Residency at UC-Irvine Medical Center in 2007. He has been with BEMG since 2007.

Ronn Berrol, MD

Ronn Berrol, MD

Medical Director, Summit Campus

Ronn Berrol, MD graduated from the University of California Davis with a B.S. in Bio-Chemistry and did his Residency at UC Irvine Medical Center. He has been with BEMG since 1993.

Jeff Chen, MD

Jeff Chen, MD

Assistant Medical Director, Summit Campus

Jeff Chen, MD graduated from UC Berkeley and then earned his MD/MPH degree at Tufts University. He completed residency at Yale New Haven Hospital and finished an Emergency Ultrasound fellowship at Highland/ACMC. He has been with BEMG since 2006.

Lisa Cheng, MD

Lisa Cheng, MD

Assistant Medical Director, Alta Bates Campus

Lisa Cheng, MD graduated from The Chicago Medical School in 2003 and completed Emergency Medicine Residency at Denver Health Medical in 2007. She has been with BEMG since 2007.

James Hirshberg, MD

James Hirshberg, MD

Chief Financial Officer

James Hirshberg, MD graduated from the University of Michigan Medical School in 2003 and completed his residency in Emergency Medicine at The Ohio State University in 2008. He has been with BEMG since 2008.

Our Providers

Aaron Barber, MD

Aaron Barber, MD

Aaron Barber, MD graduated from Iowa College of Medicine in 1994 and completed his residency in Emergency Medicine from New York University/Bellevue Medical Center in 1998. He has been with BEMG since 2011.

Stephanie Brown, MD, MPH

Stephanie Brown, MD, MPH

Stephanie Brown MD, MPH graduated from the University of Chicago Pritzker School of Medicine in 2009, and completed her Emergency Medicine residency at Los Angeles County/Harbor-UCLA Medical Center in 2012. She has been with BEMG since 2014.

Karen Carothers, MD

Karen Carothers, MD

Karen Carothers, MD has worked for BEMG since finishing her residency in Emergency Medicine in 1993. She received her MD at Tufts Medical School in Boston, MA and completed her residency in emergency medicine at Highland General Hospital in Oakland, CA.

David Chen, MD

David Chen, MD

David Chen, MD graduated from Albert Einstein College of Medicine in 2006. He completed Emergency Medicine Residency at Jacobi-Montefiore in New York in 2010. He has worked with BEMG since 2011.

Yenting Chen, MD

Yenting Chen, MD

Yenting Chen, MD graduated from University of California, Davis School of Medicine in 2004 and completed his Emergency Medicine Residency at Denver Health Medical Center in 2008. He has been with BEMG since 2008.

Steve Chin, MD

Steve Chin, MD

Steve Chin, MD obtained his Bachelor’s Degree at the University of California Berkeley and earned his MD at the University of California San Diego in 1995. He has been with BEMG since 2001.

Bradley Ching, MD

Bradley Ching, MD

Bradley Ching, MD did his residency at Highland and an ultrasound fellowship at UCSF. He has been with BEMG since 2017.

Hyacinth De Guzman

Hyacinth De Guzman

Hyacinth De Guzman, graduated from Georgetown University in 2003 and completed Emergency Residency in 2007 at Lincoln Medical Center in New York. She has been with BEMG since 2008.

Shay Dehdashtian, MD

Shay Dehdashtian, MD

Shay Dehdashtian, MD graduated from University of Illinois with an M.D. Her passion for Emergency Medicine began soon after her rotation in medical school, and in 2011, she finished residency in Emergency Medicine from Beth Israel Medical Center in NYC. She has been with BEMG since 2013.

Christopher Dutra, MD

Christopher Dutra, MD

Christopher Dutra, MD graduated from UC Davis School of Medicine in 1979. He completed an Internal Medicine residency at Kaiser Medical Center in Oakland in 1983 and an Emergency Medicine residency at Highland General Hospital in Oakland. He has been with BEMG since 2003.

Dylan Easley, MD

Dylan Easley, MD

Dylan Easley MD graduated from Indiana University School of Medicine in 2003 and completed his residency in Emergency Medicine at New York Methodist Hospital/Weil Medical College of Cornell University in 2006. He has been with BEMG since 2006.

Elijah Edwards, MD

Elijah Edwards, MD

Elijah Edwards, MD graduated from the University of Iowa in 2006 and completed his residency in Emergency Medicine in 2010 at Denver Health Residency in Denver, CO. He has been with BEMG since 2014.

Alex Fox, MD

Alex Fox, MD

Alex Fox, MD went to UNC-Chapel Hill for undergrad and med school. Wanting to see another part of the country, he did his residency at Ohio State in Columbus. He has been with BEMG since 2015.

Arti Gehani, MD

Arti Gehani, MD

Arti Gehani, MD graduated from Drexel University College of Medicine in 2006 and completed her residency in Emergency Medicine at University of Southern California in 2010. She has been with BEMG since 2013.

Nava Geula, MD

Nava Geula, MD

Nava Geula, MD graduated from University of Michigan Medical School in 2010 and completed residency at Cook County Hospital in Chicago. She has been with BEMG since 2014.

Robert Golomb, MD

Robert Golomb, MD

Robert Golomb, MD graduated from Brown University in 1981, did General Surgery residency in New York City and Emergency Medicine residency at Highland Hospital in Oakland. He has been with BEMG since 1995.

Samantha Honner, MD

Samantha Honner, MD

Samantha Honner, MD graduated from residency in emergency medicine at Alameda County Medical Center in 2008, with the Andy Levitt Academic Resident of the Year award. She has been with BEMG since 2008.

Erica Ivans, MPH, PA-C

Erica Ivans, MPH, PA-C

Erica Ivans, MPH, PA-C graduated from Touro University in 2008 with Dual Master’s Degrees. Peace Corps Volunteer in Kazakhstan 2002-2004. Graduated from Texas A&M University with a Bachelor of Science in 2002. She has been with BEMG since 2010.

Sarah Kelmenson-Chau, MD

Sarah Kelmenson-Chau, MD

Sarah Kelmenson-Chau, MD graduated from University of Pennsylvania School of Medicine in 2003 and completed her residency in Emergency Medicine from Brown University in 2007. She has been with BEMG since 2007.

Chris Kolly, DO

Chris Kolly, DO

Chris Kolly, DO graduated from Texas College of Osteopathic in 2004 and completed his residency in Emergency Medicine from Brook Army Medical Center in 2007. He has been with BEMG since 2013.

Joshua Kravetz, DO

Joshua Kravetz, DO

Joshua Kravetz, DO graduated from Touro University College of Osteopathic Medicine in Vallejo, CA in 2006 and completed his residency in Emergency Medicine at Albert Einstein Medical Center in Philadelphia in 2010. He has been with BEMG since 2015.

Keala Landry, MD

Keala Landry, MD

Keala Landry, MD attended New York Medical College and did her residency at Yale New Haven Hospital. She has been with BEMG since 2008.

Benjamin Lerman, MD

Benjamin Lerman, MD

Benjamin Lerman, MD graduated from University of Michigan, College of Medicine in 1985 and completed his residency in Emergency Medicine at University of Cincinnati Medical Center in 1989. He has been with BEMG since 1991.

Shankar LeVine, MD

Shankar LeVine, MD

Shankar LeVine, MD graduated from Warren Alpert School of Medical at Brown University in 2009 and completed his residency in Emergency Medicine at Alameda County Medical Center, Highland Hospital in Oakland, in 2013. He has been with BEMG since 2013.

Jessica Li, MD

Jessica Li, MD

Jessica Li, MD went to Stanford for college and Johns Hopkins for med school and completed residency last year at Highland. She has been with BEMG since 2016.

Monica Madsen, PA-C

Monica Madsen, PA-C

Monica Madsen, PA-C received a Master of Physician Assistant Studies from the University of Utah in 2008 and completed her clinical training in Seattle, WA. She has been with BEMG since 2014.

Dan McCormack, PA-C

Dan McCormack, PA-C

Dan McCormack, PA-C received his Bachelors of Science in Speech Communication from Cal State University Hayward in 1997 and completed his Physician Assistant Program at Stanford School of Medicine in 2004. He has been with BEMG since 2004.

Jessamy Meu, PA-C

Jessamy Meu, PA-C

Jessamy Meu, PA-C received her Bachelor of Science in Kinesiology with an emphasis in Athletic training from San Jose State University in 2008. She attended Samuel Merritt University and received her Master of Physician Assistant in 2011. She has been with BEMG since 2014.

Rod Mortazavi, MD

Rod Mortazavi, MD

Rod Mortazavi, MD graduated from the University of California, San Diego in 2010 with a Masters in Advanced Studies in Clinical Research. He attended University of California, Irvine Medical School and completed residency at UC Irvine in 2014. He has been with BEMG since 2014.

Stephanie Oberfoell, MD

Stephanie Oberfoell, MD

Stephanie Oberfoell, MD went to UCLA for medical school and graduated from Denver Health Residency.  She has been with BEMG since 2017.

Marisa Oishi, MD

Marisa Oishi, MD

Marisa Oishi, MD graduated from Oregon Health & Science University School of Medicine in 2007 and completed her residency in Emergency Medicine at Icahn School of Medicine at Mt. Sinai Hospital, NY in 2011. She also earned a Master of Public Health from University of California, Berkeley in 2006. She has been with BEMG since 2015.

Mordechai Pavlovsky, MD

Mordechai Pavlovsky, MD

Mordechai Pavlovsky, MD graduated from his Emergency Medicine Residency at Einstein Medical Center in Philadelphia, PA. He completed medical school at SUNY Downstate Medical Center in Brooklyn, NY, in 2009. He has been with BEMG since 2014.

Monica Rosenthal, MD, FACEP

Monica Rosenthal, MD, FACEP

Monica Rosenthal, MD, FACEP is a graduate of the University of Chicago (undergraduate) and the University of Illinois in Chicago (MD). She completed a residency in emergency medicine at Martin Luther King Hospital in Los Angeles. She has been with BEMG since 1988.

Kelly Sherwood, PA-C

Kelly Sherwood, PA-C

Kelly Sherwood, PA-C graduated from the University of Colorado at Boulder with a degree in English Literature then attended The of Utah School Medicine PA School. She has been with BEMG since 2015.

John Skovran, DO

John Skovran, DO

John Skovran, DO went to college in Colby College, Waterville, ME and worked in Washington, DC as a science consultant for Booz Allen Hamilton. He attended medical school at Lake Erie College of Osteopathic Medicine, PA and completed his residency at Einstein Medical Center, PA. He has been with BEMG since 2015.

Douglas Spurr, MD

Douglas Spurr, MD

Douglas Spurr, MD graduated from Albert Einstein Medical School in 1991. He completed his Internal Medicine internship in 1992 and Emergency Medicine residency in 1995 at Bronx Municipal Hospital Center. He has been with BEMG since 2008.

James Starr, MD

James Starr, MD

James Starr, MD graduated from University of Wisconsin Medical School in 1998 and completed his residency in Emergency Medicine from St. Luke’s/Roosevelt Hospital Center, NY in 2001. He has been with BEMG since 2005.

Ari Stern, MD

Ari Stern, MD

Ari Stern, MD graduated from the University of Texas Medical Branch at Galveston in 2005 and completed his residency in Emergency Medicine at Hahnemann University Hospital in Philadelphia in 2008. He has been with BEMG since 2011.

Melissa Tang, MD

Melissa Tang, MD

Melissa Tang, MD went to college at Cornell University and med school at Rutgers-New Jersey Medical School. She completed her residency at Drexel/Hahnemann University Hospital. She has been with BEMG since 2015.

Sara Tarjan, MD

Sara Tarjan, MD

Sara Tarjan, MD attended Northwestern University for undergrad. She went to Mount Sinai for medical school and am finished her residency at the University of North Carolina at Chapel Hill. She has been with BEMG since 2015.

Grace Tarng, MD

Grace Tarng, MD

Grace Tarng, MD trained at Texas Tech University and completed her residency in El Paso, Texas. She has been with BEMG since 2015.

David Toor, MD

David Toor, MD

David Toor, MD graduated from Virginia Commonwealth University School of Medicine in 2008 and completed his residency in Emergency Medicine at UCSF Fresno, Medical Education Program. He has been with BEMG since 2012.

Robert Valentine, PA-C

Robert Valentine, PA-C

Robert Valentine, PA-C graduated from University of California, Davis and has worked exclusively in emergency medicine. He has been with BEMG since 1997.

Ami Yamamoto, MD

Ami Yamamoto, MD

Ami Yamamoto, MD obtained a Bachelor of Science degree in Materials Science and Engineering at Massachusetts Institute of Technology, and her medical degree at Drexel University College of Medicine. She completed  her Emergency Medicine residency at Harbor UCLA Medical Center. She has been with BEMG since 2015.

For over thirty years we’ve committed to serving the health needs of our community.

Contact Us

Please send us an email and we'll get back to you as soon as possible.

Not readable? Change text. captcha txt

Start typing and press Enter to search