Nisha Jadhaw, MD

College:  UC San Diego

Medical School:  St. George's University

Areas of Interest:  Medical Education, Preventative Medicine, Women's and Children's Health

I was born and raised in the South Bay and could not be more honored and excited to come back and serve my community.

O'Connor Hospital holds a very special place in my heart. When I was in undergrad and deciding what I wanted to do as a career, I shadowed some of the attendings at O'Connor. I was immediately drawn to the atmosphere and culture of the hospital and clinics. At first, I did not think I had what it took to become a doctor, but after years of shadowing, I fell in love with Family Medicine and knew I had to become a Family Physician. I went off to Grenada for medical school where I met the greatest friends I could have ever asked for, learned to live in a third world country, relaxed on the most beautiful beaches, and of course, studied my brains out. I feel that I've come full circle now as a resident in this program and cannot wait to continue my education here.

My interests outside of medicine include hiking, going to the beach, traveling, hanging out with my family and friends, listening to music, and binge watching Netflix shows.  

Fun Fact: My favorite quote is, "It is our choices...that show what we truly are, far more than our abilities." - JK Rowling.


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Sonja Halterman, MD

College:  Smith College

Medical School:  UC San Diego

Other Degrees: MPH at Loma Linda University; JD at UC Davis

I am thrilled to be joining the O’Connor Family Medicine Residency and to be returning to the Bay Area after many years of roaming various parts of the country. I grew up in Half Moon Bay just north of San Jose. After high school, I decided I needed to experience the east coast. So, I attended Smith College in western Massachusetts where I studied biology and environmental science. I returned to Southern California to get a MPH from Loma Linda University, where I focused on health promotion and education. Wanderlust kicked back in and I headed to Chicago to do a year of AmeriCorps as a health educator the Austin neighborhood of Chicago. Although I was working in a clinic and drawn to medicine, working in Chicago also showed me the vast social problems that contribute to health disparities, and I decided to pursue a law degree to see if I might be able to help address underlying social determinants of health through law and policy. While in law school at UC Davis, I was focused on health and public health law, and was fortunate to be able to intern with the California Department of Public Health. Law school was fascinating and intellectually stimulating, but I was not completely satisfied – I wanted to be able to directly impact patients’ health. So, I graduated from law school, took the California Bar Exam, and immediately started medical school at UC San Diego.

I was drawn to Family Medicine because it allows me to help patients of all ages and backgrounds, while also working in communities to improve social determinants of health. I was particularly drawn to the Stanford-O’Connor program for its rigor and focus on resident education, while also being an unopposed program with caring, supportive faculty. The fact that I can work in a community close to where I grew up makes this a very special place for me!

Fun fact: I ended up being hospitalized for malaria over a year after returning from a volunteer trip to Ghana – proof that taking the full course of malarial prophylaxis is important!


Eric Matsumoto, MD

Eric Matsumoto, MD

College:  Azusa Pacific University

Medical School:  Loma Linda University

Areas of Interest:  Underserved Populations, Spiritual Care, Adolescent Medicine

I grew up in the town of Morgan Hill, CA (or "Mo' Hill" as the locals say it), so coming back to the Bay Area to train and serve my home community is a huge blessing. My first exposure to medicine was volunteering as a translator for a nearby RotaCare clinic when I was in high school. In undergrad, I enjoyed leading service teams to Mexico and partnering with a local volunteer-run hospice, which further confirmed my desire to pursue medicine for underserved populations.  In medical school, I fell in love with family medicine because of the ways it lined up with my passions for broad-spectrum training, whole person care, and at-risk populations.

My favorite aspects of the San Jose-O'Connor program are the amazing faculty, friendly residents, diverse and underserved patient population, and free food at the cafeteria!

My interests outside of medicine include piano, photography, tennis, running, and board games.

Fun Fact: I didn't buy a pair of jeans until I started medical school. I rocked khakis with no regrets.


Milt McColl, MD

College:  Stanford University

Medical School:  Stanford University School of Medicine

I was raised in a “football / medicine family” in Southern California. My father was an orthopedic surgeon who played for the Chicago Bears for 8 years during medical school and residency. Throughout medical school I was also fortunate enough to play professional football as a starting linebacker for the San Francisco 49ers and earned two Super Bowl rings. After retiring from football, I chose to put my medical residency on hold and spent the next twenty plus years developing medical devices. During my career in business I never lost my passion for medicine and treating patients. I volunteered at a local primary care free clinic treating underserved, low income patients, many of whom were immigrants. Since my wife and I have now finished raising our four boys, I decided to “go back” and complete my residency. Eventually, I hope to work in a Federally Qualified Health Center or a non-profit clinic. Since I have experience volunteering as an international health care provider, I hope to spend a portion of my time in that capacity also.

O’Connor has been an incredible place for me to “re-enter” clinical medicine. It has an extremely positive environment and focuses not just on caring for patients but also on teaching. I feel very fortunate to be able to return to my passion and be a part of such a great place to learn medicine.

Fun Fact: About two years ago I started flying single engine planes and eventually earned my private pilot license. In my free time I enjoy flying, playing golf, hiking, biking, and most of all, watching my youngest son playing college baseball for Harvard (Go Crimson!)


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Nelly Song, MD

College: University of Texas at Austin

Medical School: The University of Texas Medical School at Houston

Areas of Interest: Underserved Populations, Preventative Medicine, Dermatology, Medical Education

I was born and raised in Houston, Texas to parents who had immigrated to the U.S. during the Salvadoran Civil War. While growing up, I traveled to El Salvador with my family on an annual basis. It was there where I learned just how limited access to care could be. As a result of this experience, I set my mind to medicine. I went to the University of Texas at Austin to study Biomedical Engineering and then to the University of Texas Medical School at Houston. I also volunteered at several free clinics, organized preventative health events, and mentored children and adolescents. Fast forward to now, I’m very happy to be at Stanford-O’Connor. The training provides full-spectrum family medicine and is unopposed; the faculty, residents, and staff are very supportive; and the program is dedicated to the underserved.

In my spare time I enjoy spending time with my husband, family, and dogs; learning and cooking different cuisines; baking; eating delicious food; running; yoga; hiking; and camping.

Fun fact:  I run 6 miles with my two adopted rescue dogs. Woof! Woof! Run!


Anh Tan, MD MPH

College:  Stanford University

Medical School:  Chicago Medical School

Other Degrees:  MPH from Johns Hopkins University

Areas of Interest:  Underserved Populations, Global Health, Public Health, Preventative Medicine

I was born and raised in Olympia, Washington, the daughter of Vietnamese refugees who instilled in me the importance of family, community, and education. At Stanford, I discovered the wonderful world of public health, and went on to work at several nonprofits to combat hepatitis B and other infectious diseases. After getting a public health masters from Johns Hopkins, I decided I wanted to be a clinician after all. I went to medical school to become a primary care physician and fell in love with Family Medicine.

O’Connor’s Family Medicine program is the residency of my dreams: a community-based, university-affiliated, unopposed program where the training is rigorous and the people are happy and down-to-earth. I love the amazing faculty and residents, nurturing environment, and exceptional quality of teaching. San Jose also happens to be one of my favorite cities —a diverse and vibrant community where I can serve people from all walks of life.

Fun Fact: I started a hip hop performance troupe in college called dv8.


Stephen Vogel, MD

College:  Davidson College

Medical School:  Wake Forest School of Medicine

Areas of Interest:  Preventative Medicine, Health & Wellness, Sports Medicine

I'm a native of Sacramento who was lured back to California after a long stint in the South. I've always valued maintaining a wide range of interests, following a path that led me through an undergrad degree in music, a General Surgery intern year, and ultimately a happy realization that Family Medicine is where I belong!

Reasons I love the program: the camaraderie, the diversity of resident and faculty backgrounds and interests, and the ardent enthusiasm for teaching obvious each day among everyone.

My interests outside of medicine include all things cycling, keyboard instruments, road trips, and cooking as stress relief.

Fun Fact: I was in a humanities class with Steph Curry.


Lydia Wong, MD

College:  UC Berkeley

Medical School:  Ohio State University College of Medicine

I was born in Hong Kong and moved to the Bay Area when I was 5. I found my passion for medicine during college while volunteering with various non-profit health organizations in local communities. While I loved gorging on Jenis ice cream and defrosting my car at unsavory hours during my time in the Midwest, my heart was always in California and I am delighted to be back here for my residency training!

I did a sub-I at OCH as a fourth year medical student and was completely sold by the high quality of teaching from both attendings and residents, the supportive nature of the residency family, and the intrinsically happy culture of the program. OCH is the perfect place for me and I couldn't be happier to have matched here.

My interests outside of medicine include planning future travels, going on food adventures, taking scenic hikes on sunny days, and enjoying that perfect cup of coffee.

Fun Fact: I am on a lifelong mission to find the best ice cream in the world.


Allison Xie, MD

College:  Wellesley College

Medical School:  Geisel School of Medicine at Dartmouth

My family moved from China to Hawaii about a decade ago, and while my parents remained on the sunny island, I ventured to the East coast for college and medical school. As a history major, I was particularly drawn to the development of humanism. In medical school, I gravitated toward family medicine because it is a specialty that best manifests the humanistic aspect of medicine. After four years in beautiful but freezing New Hampshire, I am very glad to be back in warm weather again.

I chose O'Connor because of the rigorous curriculum, diverse patient population, supportive faculty and residents, and the wonderful sense of community. I feel so fortunate to be part of this family and look forward to learning from everyone in the next few years!

Fun Fact: I enjoy cooking, board games, ballroom dancing, and flipping through old historical manuscripts for funny quotes (malleus maleficarum has some great ones).