Victoria Lyo, M.D., M.T.M., F.A.C.S. for UC Davis Health

Victoria Lyo, M.D., M.T.M., F.A.C.S.

Associate Professor of Surgery

Associate Director of Clinical Research for the Center for Alimentary and Metabolic Science

Director of Surgery, Foregut & Esophageal Motility Center

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



Surgery - Bariatric

Surgery - Foregut & Metabolic

Minimally Invasive Surgery

Robotic Surgery




Locations and Contact

UC Davis Medical Center - Cypress Building

UC Davis Medical Center - Cypress Building
2221 Stockton Blvd.
Sacramento, CA 95817

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Additional Numbers

Clinic Phone


Clinic Fax


Physician Referrals

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

Philosophy of Care

I believe in providing compassionate and expert care for my patients. My driving force is for my patients to obtain optimal outcomes and relief from their problems. I rely on current, data-driven best practices for my surgical recommendations as well as the rich expertise of my colleagues and mentors to ensure my patients do well.

I strive to listen thoroughly and communicate clearly to explain my clinical reasoning and recommendations so that patients completely understand their options and what to expect. I love showing pictures of anatomy to my patients and reviewing their imaging results with them so that they better understand their issues. I treat my patients with the same respect and kindness as I would want my own family to receive.

I am happy to see patients via Video Visit as well.

Clinical Interests

Dr. Lyo specializes in minimally invasive (laparoscopic and robotic) and traditional open techniques to address obesity, foregut diseases such as GERD, achalasia, and hiatal hernias, as well as abdominal wall and groin hernias, and gallbladder disease.

She is fellowship-train in minimally invasive surgery, having trained under Dr. John Hunter, a world-expert and pioneer in foregut surgery. Dr. Lyo has expertise in:

- Foregut: esophageal dilation and stenting, Heller myotomy for achalasia, anti-reflux procedures, hiatal hernias, gastric fundoplications and gastric resection, feeding tube placement, gastroparesis

- Bariatrics: gastric bypass, sleeve gastrectomy, revisional/redo surgery

- Hernia: complex abdominal wall reconstruction, component separation, groin/inguinal hernias

- Biliary: gallbladder removal, bile duct exploration, laparoscopic-assisted ERCP

Research/Academic Interests

Dr. Lyo's research focuses on understanding the interactions between the gut microbiome and human host, specifically on how the microbiome contributes to obesity and obesity-related diseases. By better understanding this area, she aims to improve the management of obesity and outcomes after bariatric surgery. She also performs research on surgical outcomes as well as education. She has received prestigious research awards throughout her career, and while on faculty at UC Davis.

Dr. Lyo has an extensive biomedical research background and holds a Master degree in Translational Medicine from UC Berkeley and UCSF. She is committed to developing innovative devices and products to bring into clinical practice.


Foregut, Metabolic and General Surgery
General Surgery

Center/Program Affiliation

Center for Alimentary and Metabolic Science

Undergraduate School

B.A., Wellesley College, Wellesley MA 2005

Medical School

M.D. with Distinction, UC San Francisco, San Francisco CA 2011

Other School

M.T.M., UC Berkeley & UC San Francisco, Berkeley and San Francisco CA 2015


General Surgery, UC San Francisco, San Francisco CA 2011-2012


General Surgery, UC San Francisco, San Francisco CA 2012-2018


Advanced GI and Minimally Invasive Surgery, Oregon Health and Science University, Portland OR 2018-2019

Society of American Gastrointestinal and Endoscopic Surgeons Research Award, 2021

Pacific Northwest American College of Surgeons Bruce Wolfe Bariatric Research Award, 2019

UC San Francisco Lawrence Way Critical Thinking Award, 2018

UC San Francisco Dean's Prize in Research Award, 2011

Howard Hughes Medical Institute Medical Research Fellowship, 2009, 2010

To see a complete list of publications for Dr. Lyo, please click here.

Lyo V, Stroud A, Wood S, Macht R, Carter J, Rogers S, Husain F. Reoperations after sleeve gastrectomy: a dual academic institutional experience. Surg Obes Relat Dis. 2022 May;18(5):641-649. doi:10.1016/j.soard.2022.01.015. Epub 2022 Jan 21. PMID:35181221.

Yoon P, Rajasekar G, Nuño M, Raskin E, Lyo V. Severe Obesity Contributes to Worse Outcomes After Elective Colectomy for Chronic Diverticular Disease. J Gastrointest Surg. 2022 Mar 25. doi:10.1007/s11605-022-05303-2. Epub ahead of print. PMID:35334024.

Crafts TD, Lyo V, Rajdev P, Wood SG. Treatment of achalasia in the bariatric surgery population: a systematic review and single-institution experience. Surg Endosc. 2021 Sep;35(9):5203-5216. doi:10.1007/s00464-020-08015-3. Epub 2020 Oct 13. PMID:33048227.

Young CS, Lyo V, Harris HW. Fascial defect size predicts recurrence following incisional hernia repair: A 7-year, single-surgeon experience. Int J Abdom Wall Hernia Surg. 2020;3:11-7. doi:10.4103/ijawhs.ijawhs_50_19.

Lyo V, Schafer AL, Stewart L. Roux-en-Y gastric bypass is a safe and effective option that improves major Co-Morbidities associated with obesity in an older, veteran population. Am J Surg. 2019 Oct;218(4):684-688. doi:10.1016/j.amjsurg.2019.07.027. Epub 2019 Jul 20. PMID:31399194.

Cattaruzza F, Amadesi S, Carlsson JF, Murphy JE, Lyo V, Kirkwood K, Gottrell GS, Bogyo M, Knecht W, Bunnett NW. Serine Proteases and Protease-activated Receptor 2 Mediate the Proinflammatory and Algesic Actions of Diverse Stimulants. Br J Pharmacol. 2014 Aug;171(16):3814-26. doi:10.1111/bph.12738. PMID:24749982.

Alemi F, Kwon E, Poole DP, Lieu T, Lyo V, Cattaruzza F, Cevikbas F, Steinhoff M, Nassini R, Materazzi S, Guerrero-Alba R, Valdez-Morales E, Cottrell GS, Schoonjans K, Geppetti P, Vanner SJ, Bunnett NW, Corvera CU. The TGR5 Receptor Mediates Bile Acid-Induced Itch and Analgesia. J Clin Invest. 2013 Apr;123(4):1513-30. doi:10.1172/JCI64551. Epub 2013 Mar 25. PMID:23524965.

Lyo V, Cattaruzza F, Kim T, Paulick MG, Cox D, Cloyd J, Buxbaum J, Ostroff J, Bogyo M, Grady EF, Bunnett NW, Kirkwood KS. Active cathepsins B, L, and S in murine and human pancreatitis. Amer J Physiol Gastrointest Liver Physiol. 2012 Oct 15;303(8):G894-903. doi:10.1152/ajpgi.00073.2012. Epub 2012 Aug 16. PMID:22899821.

Lyo V, Jaigirdar AA, Thummala S, Morita ET, Treseler PA, Kashani-Sabet M, Leong SPL. In-transit Intramammary Sentinel Lymph Nodes from Malignant Melanoma of the Trunk. Ann Surg. 2012 Jan;255(1):122-7. doi:10.1097/SLA.0b013e31823c0890. PMID:22143205.