Alison Sumiko Breen, M.D. for UC Davis Health

Alison Sumiko Breen, M.D.

Associate Clinical Professor, Department of Department of Obstetrics and Gynecology

To see if Alison Sumiko Breen is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Obstetrics and Gynecology

Locations and Contact

UC Davis Medical Group - Elk Grove

UC Davis Medical Group - Elk Grove
8110 Laguna Blvd.
Elk Grove, CA 95758

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Additional Numbers

Clinic Phone


Clinic Phone


Physician Referrals

800-4-UCDAVIS (800-482-3284)

Philosophy of Care

I genuinely enjoy being an OBGYN. Building relationships with my patients is a key part of my practice. I love delivering babies and providing prenatal care. No one likes having a pelvic exam, but if I can make your experience less uncomfortable, then it’s been a successful day! Whether you are pregnant and anticipating a baby, preparing for surgery, have a breast or pelvic issue or you are seeking routine well-woman care, my intent is to listen, educate and provide excellent care. I am proud to work at UC Davis, where I completed medical school and residency training, working alongside the doctors who inspired me to become an OBGYN.

Clinical Interests

Dr. Breen is a general OBGYN offering care for women of all ages and at all stages of their reproductive life cycle. She has a special clinic interest in prenatal care and splits her time between clinic and delivering babies on Labor and Delivery at the UC Davis Medical Center. She also sees women for a variety of other breast and pelvic issues including contraception, well woman care, cervical cancer and breast cancer screening, vaginitis and sexual health (to name a few).


Obstetrics and Gynecology

Center/Program Affiliation

UC Davis Medical Group
Women's Center for Health

Undergraduate School

B.A., Wellesley College, Wellesley MA 2003

Medical School

M.D., UC Davis School of Medicine, Sacramento CA 2009


Obstetrics and Gynecology, UC Davis Medical Center, Sacramento CA 2009-2013

Association of Professors of Gynecology and Obstetrics (APGO) Excellence in Teaching Award, 2020

Kargozaran H, Yuan SY, Breslin JW, Watson KD, Gaudreault N, Breen A, Wu MH. A role for endothelial-derived matrix metalloproteinase-2 in breast cancer cell transmigration across the endothelial-basement membrane barrier. Clin Exp Metastasis. 2007;24(7):495-502. doi:10.1007/s10585-007-9086-6. Epub 2007 Jul 25. PMID:17653824.