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2025-2026 Resident Roster

4th Years

William (Preston) Carroway, MD

Hometown: Piedmont, OK

Undergraduate: University of Oklahoma

Medical School: Oklahoma University College of Medicine

Favorite thing about UCSF-East Bay: My co-residents and the operative experience.

About Me: I love going on walks with my dog and fiancé, and finding new places to eat at. I build furniture for my apartment - TV stands, coffee tables, nightstands, headboards. I am brand new to the West Coast, and loving it so far!

wcarroway@alamedahealthsystem.org

Brandon Cowan, MD

Hometown: Santa Barbara, CA

Undergraduate: University of California, Berkeley

Medical School: Oakland University William Beaumont

Favorite thing about UCSF-East Bay: I was attracted tot he culture of compassionate and clearly brilliant residents and attendings, with a county hospital experience that rewards our hard work with interesting cases that residents can take a lot of ownership in. I'm constantly inspired by the people around me to learn more and to be a better person and physician.

About Me: I love to ride bikes, run around Lake Merritt, and find cool places to drink beers.

bcowan@alamedahealthsystem.org

Nikathan (Niko) Kumar, MD

Hometown: Madison, CT

Undergraduate: Vanderbilt University

Medical School: New York Medical College

Favorite thing about UCSF-East Bay: The operative experience and the autonomy!

About Me: My favorite things to do are playing soccer, running, biking, and playing piano.

nikkumar@alamedahealthsystem.org

Sahil Patel, MD

Hometown: Denver, CO

Undergraduate: Case Western Reserve University

Medical School: Medical University of South Carolina

Favorite thing about UCSF-East Bay: The resident culture, autonomy given to the residents, and exposure to working at multiple hospital systems.

About Me: I enjoy camping, going to concerts, trying out new beers, and watching/playing soccer (huge Tottenham fan).

sahpatel@alamedahealthsystem.org

Carissa (Cey Cey) Villanueva, MD

Hometown: Long Beach, CA

Undergraduate: UCLA

Medical School: USC

Favorite thing about UCSF-East Bay: 

About Me: My favorite things to do outside of the hospital are Olympic weightlifting 🏋🏻‍♀️, Muay Thai 🥊, Basketball 🏀, Eating donuts 🍩

cavillanueva@alamedahealthsystem.org