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    Find a Doctor > Dr. John J. Feng, M.D., FACS
    John Feng

    John J. Feng, M.D., FACS

    Bariatric (Weight Loss) Surgery

    Accepting new patients


    (Board Certified)
    Accepting new patients

    Offers My Health Online

    San Carlos Center
    301 Industrial Road
    Level 2
    San Carlos, California 94070
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    (650) 596-4120 
    Palo Alto Center
    795 El Camino Real
    Jamplis Building, Level A
    Palo Alto, California 94301
    View Mapof 795 El Camino Real, Jamplis Building, Level A, Palo Alto. Opens in new window
    (650) 853-5340 
    Fremont Center
    3200 Kearney Street
    Building 2, 2nd Floor
    Fremont, California 94538
    View Mapof 3200 Kearney Street, Building 2, 2nd Floor, Fremont. Opens in new window
    (650) 853-5340 
    Dublin Center
    4000 Dublin Boulevard
    2nd Floor
    Dublin, California 94568
    View Mapof 4000 Dublin Boulevard, 2nd Floor, Dublin. Opens in new window
    (650) 853-6671 

    Professional Interests

    Bariatric (Weight Loss) Surgery
    Gastric banding, Gastric bypass surgery, Roux-en-Y gastric bypass, Vertical sleeve gastrectomy

    Abdominal surgery, Abdominal wall reconstruction, Achalasia, Adrenal surgery, Advanced laparoscopy, Anti-reflux surgery, Bariatric surgery, Cancer surgery, Colorectal surgery, Endocrine surgery, Gallbladder surgery, Gastric banding, Gastric bypass surgery, Gastrointestinal surgery, Hemorrhoids, Hepatobiliary surgery,
    See more + Click to expand Professional interests

    Additional Information

    Robotic assisted advanced laparoscopic surgery for general surgery and bariatric surgery

    Spoken Languages

    Mandarin (Excellent)
    Spanish (Fair)

    Community Activities

    Active memberships: American Society for Metabolic and Bariatric Surgery (ASMBS), American College of Surgeons Fellow (FACS), Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), Society for Surgery of the Alimentary Tract (SSAT)

    Personal Interests

    Dr. Feng enjoys spending time with family and friends. He plays recreational badminton and going out to the movies. He is a gadget guy and loves his toys. He also enjoys biking, hiking, boating, stand up paddleboarding, and kayaking.

    Physician Web Link


  • Hyperoxia and angiogenesis. Hopf, H.W., Gibson, J.J., Angeles, A.P., Constant, J.S., Feng, J.J., Rollins, M.D., Zamirul Hussain, M., Hunt, T.K., Wound Repair Regen - 2005-11-01
  • Effect of standard vs extended Roux limb length on weight loss outcomes after laparoscopic Roux-en-Y gastric bypass. Feng, J. J., Gagner, M., Pomp, A., Korgaonkar, N. M., Jacob, B. P., Chu, C. A., Voellinger, D. C., Quinn, T., Herron, D. M., Inabnet, W. B., Surg Endosc - 2003 Jul
  • The early effect of the Roux-en-Y gastric bypass on hormones involved in body weight regulation and glucose metabolism. Rubino, F., Gagner, M., Gentileschi, P., Kini, S., Fukuyama, S., Feng, J., Diamond, E., Ann Surg - 2004 Aug
  • Early experience with computer-mediated flexible circular stapling technique for upper gastrointestinal anastomosis. Waage, A., Gagner, M., Feng, J. J., Obes Surg - 2003 Feb
  • Laparoscopic biliopancreatic diversion with duodenal switch. Feng, J.J., Gagner, M., Semin Laparosc Surg - 2002 Jun
  • Lactate elicits vascular endothelial growth factor from macrophages: a possible alternative to hypoxia. Constant, J. S., Feng, J. J., Zabel, D. D., Yuan, H., Suh, D. Y., Scheuenstuhl, H., Hunt, T. K., Hussain, M. Z., Wound Repair Regen - 2000 Sep-Oct
  • Lactate stimulation of macrophage-derived angiogenic activity is associated with inhibition of Poly(ADP-ribose) synthesis. Zabel, D. D., Feng, J. J., Scheuenstuhl, H., Hunt, T. K., Hussain, M. Z., Lab Invest - 1996 Mar
  • Maturation of jejunoileal gradients in rat intestine: the role of intraluminal nutrients. Castillo, R. O., Feng, J. J., Stevenson, D. K., Kwong, L. K., Biol Neonate - 1992
  • Altered maturation of small intestinal function in the absence of intraluminal nutrients: rapid normalization with refeeding. Castillo, R. O., Feng, J. J., Stevenson, D. K., Kwong, L. K., Am J Clin Nutr - 1991 Feb
  • Regulation of intestinal ontogeny by intraluminal nutrients. Castillo, R. O., Feng, J. J., Stevenson, D. K., Kerner, J. A., Kwong, L. K., J Pediatr Gastroenterol Nutr - 1990 Feb

  • Philosophy of Care

    I strive to provide high-quality, excellent outcome, surgical care to all my patients in a personal, compassionate manner. I engage patients in discussions about their care and empower them to share in the decision-making process. I believe that rather than just telling my patients what to do, it is important to provide informed options so that they can choose what fits best with their personal values, to the extent that it is safe and reasonable to do so. I really enjoy just about all of the interactions with my patients. I like explaining what is going on and helping them understand their general surgical issues. I welcome questions, because I believe that the more patients understand, the better able they are to care for themselves. Most of all, I enjoy working with my patients as a partner in their surgical care. In addition to general surgery, I advanced my training many years ago by specializing in weight loss or bariatric surgery and in minimally invasive surgery for all surgeries. For weight loss surgery (bariatric surgery) patients, I put great effort in providing comprehensive and expert care with long-term follow-up, along with expert colleagues in the surgical treatment of obesity, one of my specialties. Together, my colleagues and I, offer options including vertical sleeve gastrectomy, adjustable gastric banding (Allergan Lap-Band System), and Roux-en-Y gastric bypass using minimally invasive or laparoscopic techniques. With the latest advances in surgical technology such as robotic assisted surgery with 3D vision as an example, I always looks forward to offering the best of these important tools to aid in the care of my patients.

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