1. David Bortz, MD

    1. David Bortz, MD

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    San Diego, CA

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    David Bortz, MD

    4.4 (51 reviews)
    Open 9:00 am - 5:00 pm
    Updated 3 months ago

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    1 year ago

    Dr. Bortz was a very caring and compassionate doctor. He was good at his practice of medicine.

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    Page 1 of 2

    Ask the Community - David Bortz, MD

    Review Highlights - David Bortz, MD

    Most recently I needed my medical records and Leanne was made aware that I was in kind of a time pinch.

    Mentioned in 4 reviews

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    Amy Witman, MD - Dr. Witman takes the time to explain things in easy-to-understand language and answers all your questions

    Amy Witman, MD

    4.7(14 reviews)
    4.3 miCarmel Valley

    Dr. Witman is a most caring doctor who is well-versed in a large sweep of medical issues. She is…read morealways digging into new medical research because of her inate curiosity and to help her patients. She is thorough in her assessment, organized to help you find specialists if she sees the need to refer you. Best of all, she is a caring doctor who takes her time to review your concerns with you and guides you to better health outcomes.

    Dr. Amy Witman is a smart, attentive physician who listens carefully, and is most caring and…read moreresponsive to patient concerns. She stays up-to-date on medical research and has phoned me with additional info after following up on several of my appointments with further research on a related topic. In this era of changing healthcare, we definitely want our doctors' knowledge to be growing with the times. Dr. Witman is an exceptional physician who is tenacious in her resolve to figure out the best way to help her patients. I appreciate the lengths she has gone to - to maximize my health. Besides further research, she has referred me to specialists who she communicated with, and advocated for me when she didn't think a specialist was treating my case with the urgency she felt it warranted. She has also helped interpret other doctors' notes, lab reports & x-rays for me so that I understood what they meant. Availability has been so valuable. Every time I have called her office with some ailment, I have been able to get in to see the doctor that day. When I have sent Dr. Witman an email summarizing visits with specialists...she responded off-hours even if it was a weekend or evening. Her responses were very detailed indicating that she has studied the results from the various specialists. She truly is dedicated to delivering the highest quality personal healthcare.

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    Tung Lai, MD

    Tung Lai, MD

    2.0(28 reviews)
    2.2 miMira Mesa

    Not everyone out in public or even within being on line, is going to like you. My medical condition…read morehas showned me this from both perspectives on who we see for the day and how they look at you and treat you. For ppl like US with these issues on our health, expects the charity reflection as the Drs visits are the primary expectations for this sense to live out our hopes to be respected and admired. Dr Lai's Office is far from the Walk In process at the hospital when things are really serious at the mid to high level, Dr Lai is a lower level of a Dr of Medicine, their main concern is to be judgmental for the referrals, ER emergency transfer, and the scams of fraud on relatives using their elders of mischievous reasons only they are not aware of , etc. They get calls all the time on Srs missing their meds so the judgmental part is a professional approach to many as they do this to me insuring my twin junkie not there, lol.. I can only expect this no matter how many years I have to see him for I rather complain about my overall health status than to look for an escape route to blame and bicker towards the public and become an online bigot for not getting what I want and expect. I gave them 3 stars and like many would like relations a bit better but best to always follow up of issues or concerns they will and overlook due to their jobs being the way it is of the Office being a low urgent matter regarding medicines and expected of the low numbers of patients they serve , which helps a lot for not having to wait too long as I did for 3 hours as a walk in but expected in any other clinic so best to always plan ahead to call in and schedule. If you live near , Dr Lai is very convenient for this part I love about the Office as priority #1

    All of my experiences so far have been very positive. Dr. Lai listened to all of my concerns, and…read morehe's always quick to get prescriptions or referrals out in a timely manner.

    Advanced Functional Medicine - Sara Leckman, BSN, RN, HHC

    Advanced Functional Medicine

    4.6(126 reviews)
    1.5 miSorrento Valley

    This is an update to a review I left back in January 2026. I appreciated that Dr. Willis reached…read moreout a number of times to see how they could make this right with me. Considering I still have health concerns that I'd like to correct I felt he provided a sincere concern on how to rectify the situation. As a business owner myself that was is important to me. I am willing to go along with the program designed for me (which is much different than the first time around). I cannot say if it is going to make a difference since it's only been a week. Health issues can be very complex and achieving the desired results can and usually does take many paths. I encourage anyone seeking optimal health to at least talk with AFM with their concerns and ask the honest questions and do the research on understanding your individual health concerns. Thank you Dr. Willis for responding to my previous review.

    I spent nearly $11,000 with Advanced Functional Medicine seeking treatment for mold-related illness…read moreand left feeling completely misled. I was not there for treatment of my autoimmune condition--I already had a neurologist managing that. I came specifically for help with mold illness, yet nearly every symptom I reported was attributed to my autoimmune disease while my mold concerns were never addressed. At the time, I was incredibly sick and so desperate to feel better, so I was willing to try almost anything that gave me hope. Because of that, it didn't take much for me to agree to finance treatment. I deeply regret that decision. My initial consultation was with Dr. Willis, but after that I never saw him again. Every subsequent appointment I had was with other staff members, such as a nutritionist. I later learned that Dr Willis was a chiropractor rather than a functional medicine physician, and there was no physician involved in my care who could prescribe medications. Most appointments were phone calls that consisted of me crying and being told to give the 'treatment' more time while my health continued to decline significantly. I also experienced repeated problems with my 'medical records' and the administrative side of my care, including errors in medical documentation and billing. In my experience, the entire process was disorganized and added to an already overwhelming situation. After months of treatment, I had accumulated a large loan while my condition continued to worsen. Ironically, I am now doing significantly better under the care of a physician who actually specializes in mold-related illness and toxicity. This experience left me feeling devastated and taken advantage of. This is my personal experience, and I hope others carefully research who will be treating them, understand their credentials and scope of practice, and think carefully before making a significant financial commitment before signing anything.

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    Brent Rathbun, MD

    Brent Rathbun, MD

    4.6(9 reviews)
    4.4 miCarmel Valley

    ***please note: I am re-posting this review because Yelp's filter unfairly hid my review,…read moreapparently thinking that it was bogus. I can assure you I am not related to the doctor, he's not my friend, and I have nothing to do with his business! I put a lot of time and thought into this review, and I only did it to tell the truth.*** I could not disagree more with the firsrt reviewer. I think Dr. Rathbun is outstanding. Dr. Rathbun has been my family's physician for half a decade now, and I have nothing but good things to say. Dr. Rathbun has a quiet and gentle manner that puts children (and nervous adults) at ease. He is never pompous, abrupt, or condescending, which are traits one unfortunately sees sometimes in doctors who graduate from the best medical schools (Dr. R went to UCSD). Instead, he is patient, courteous, and calm, and appears genuinely concerned about his patients' well-being. In my experience, he approaches the patient's concerns with the seriousness appropriate to the occasion, but is never without a genuine smile and a bit of humor to lighten the mood. The first reviewer said that Dr. Rathbun rashly blurted out to her mother that she "may have cancer when there was nothing to indicate this." I mean no disrespect to that reviewer, but I find that very hard to believe; it just doesn't square at all with my experience. Here's an example: in infancy, my daughter experienced a series of unexplained ilnesses and multiple bouts of pneumonia. People started throwing around the "C" word, so when I approached Dr. Rathbun about an underlying cause, I was really scared. (Dr. Rathbun had already suggested we consider a more comprehensive approach to find out what was going on.) Dr. Rathbun was not alarmist at all. He calmly listened to my concerns, reviewed my daughter's medical history, then helped me formulate a plan for invesitgation and eventual diagnosis. Happily, it turned out she does not have cancer, but a condition that more or less resolves itself by adulthood and can be managed in the meantime with proper prevention. Throughout the diagnostic process, Dr. Rathbun was always available with a calm, practical, and reassuring response to the changing information. Here's another: a while ago, I began experiencing pressure and pain that started to interfere with my ability to run and carry the kids. Being a lifelong runner and a mother, I was worried. Of course when I finally went to see Dr. Rathbun, I was worried about the big C. As always, Dr. Rathbun calmly and patiently listened to my symptoms, asked pertinent questions, conducted a thorough exam, and then devised a plan of testing and diagnosis, starting with the simplest and most obvious and working up from there. Never once did he say, "Oh, my God, I think you have cancer!" or anything so ridiculous. He must have read that fear on my face, though, because at the close of the visit, he said with a smile, "And no, I don't think it's cancer. Nothing in your symptoms or your exam suggests that." Finally, even my husband, who HATES going to the doctor and avoids it until a body part is falling off, likes Dr. Rathbun. He was a little leery before his first visit; he said, "Isn't he a baby doctor?" But after Dr. Rathbun helped resolve a long-standing elbow problem that had plagued him for months and interfered with his push-ups, he agreed that Dr. Rathbun is pretty great. In short, in my opinion Dr. Rathbun is an excellent pediatrician and family practitioner, and I would highly recommend him.

    Dr. Rathbun was kind, patient, and insightful when it came to a difficult conversation regarding my…read moremother's memory loss. He is thorough and an excellent clinician. He took time to answer all of our questions. I would highly recommend him.

    David Bortz, MD - internalmed - Updated July 2026

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