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    John Kellogg, MD, MS

    5.0 (3 reviews)
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    Anlin Xu, MD - Dr. Anlin Xu

    Anlin Xu, MD

    4.2(15 reviews)
    0.1 mi

    Dr Xu has been my allergy and asthma doctor for many years. I developed severe allergies and asthma…read morein adulthood. Year after year, I suffered so much from allergies and never expected to find the relief I'm now experiencing. Dr Xu is my favorite doctor (I have several) and has helped me get my symptoms under control. Her care has been positively life changing. I have complete confidence in her expertise. She is a highly skilled and sought after expert in the Bay Area. Her practice has a few locations in the South Bay which makes scheduling very convenient. Her staff is well trained, friendly and helpful. Dr Xu is thorough, takes time with each of her patients, she's kind, compassionate and very professional. She has excellent communication skills and explains things in an understandable manner. I never feel rushed and always feel like she truly cares about me and my overall health. I highly recommend Dr Xu and the team at South Bay Allergy and Asthma Group. Five Stars all around!

    I'm so disappointed in Dr Xu and all her practices…read more First of all, she added herself onto my care team without prior consent or as much as to even ask me or speak to me. I just received an email saying that she's been added to my care team even though she's not in network. Secondly, to charge my insurance $3,000 for allergy testing is completely insane, I understand prices have gone up but to blatantly price gouge , shame on you. These people only care about one thing and that's money! Dr Xu was not personable, was snappy when I called about lab work she ordered for tests that don't even exist (how are you an allergist and you don't know that these tests you've ordered don't even exist, like there is no lab that provides these tests at all). And on top of that provided my primary care doctor a rude note of my visit with her. I did not consent to this either it just happened.

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    Anlin Xu, MD - Mountain View Office (near El Camino Hospital)

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    Mountain View Office (near El Camino Hospital)

    South Bay Allergy and Asthma Group - Dr. June Zhang

    South Bay Allergy and Asthma Group

    4.4(18 reviews)
    11.9 mi

    While I found the treatment effective during the first year and appreciated Dr. Zhang's nice…read moredemeanor, I experienced several ongoing concerns with the overall office operations. My main issue is that this office has always felt like a money-grab. The office often recommended additional tests and appointments that did not seem necessary. Although I understand the value of Ni-Ox and lung function assessments, the repeated testing rarely resulted in meaningful adjustments to my treatment plan. Appointments frequently ended with vague feedback rather than clear next steps for improvement. During one visit, I had a reaction to the shots, which was a stressful situation. The staff appeared uncertain about how to respond, and Dr. Zhang invited a medical assistant to observe my hives without asking for my consent. This was uncomfortable and dehumanizing. Additionally, I received the bill for this appointment and they charged me for a lung function test I did not take. I contacted the billing department who said they would call me back. I never received a call back despite following up. I check today to see they have revised their billing statement to deduct that charge. Very shady business that prioritizes money over patient care. I am now seeing a new allergist who looked at my tests and said that allergists should not be administering shots to people with numbers as bad as mine were.

    Dr. Zhang at South Bay Allergy & Asthma is a wonderful and very caring doctor. She is fantastic…read morewith kids - friendly, patient, and able to put them at ease right away. She listens carefully to parents' concerns and never makes us feel rushed. We truly appreciate her thoughtful approach and highly recommend her to any family looking for excellent allergy and asthma care.

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    South Bay Allergy and Asthma Group - Waiting Room

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    South Bay Allergy and Asthma Group - Dr. John Kellogg

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    South Bay Allergy and Asthma Group - Our physicians

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    Nancy Cummings, MD - Dr. Nancy Cummings

    Nancy Cummings, MD

    4.8(18 reviews)
    8.2 mi

    Dr. Cummings is the Allergy, Asthma and Immunology specialist at Menlo Medical Clinic and,…read moreaccording to her bio on the MMC site, she has been with them for 23 years. My three little boys have a variety of allergies and are all subject to asthma/wheezing, so we've gotten to know Dr. Cummings over several years now... and I'm thankful that she is here to help us sort through the associated complex and stressful issues. She's got the experience and research knowledge to know what she's doing -- and during my interactions she's demonstrated both a friendly bedside manner and a balance between confidence and caution that I find reassuring. Of course with allergies as with lots of other ailments, doctors are still learning -- so even the experts can often not tell you the "right answer" for how to manage a particular allergy. And it's no fun bringing your little guys in to be poked and prodded each year for an allergy test, especially when (as on our last visit) my three year old's uncomfortable skin test got botched and had to be repeated. But as with most things, no pain, no gain. And since we are trying to do our very best to keep our little guys safe and comfortable over the long haul, we're going to keep coming to Dr. Cummings for the best advice we can get.

    I've been having allergy issues off and on for all my life. For the past few years, it's been…read moremostly on, but all the different allergists I'd gone to had mostly thrown their hands up and said they didn't know how to treat me. I've been told I'm allergic/sensitive to chemicals, and there's no known way to treat that. Dr Cummings was highly recommended to me, and I went to her as a last ditch effort. She took a look at all my previous testing, listened to me talking about my symptoms, and pinpointed my main (though not only) problem immediately - untreated silent reflux - and gave me a recommendation for her colleague, Dr Chan. She was right on the money. Dr Chan tested me, put me on meds, and I've never been better. Unlike other allergists I've gone to, Dr Cummings knows what can mimic allergy problems, and who to send you to. And I'm really grateful for that expertise, and her wonderful bedside manner.

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    Nancy Cummings, MD - From menlo clinic site

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    From menlo clinic site

    John Kellogg, MD, MS - allergist - Updated May 2026

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