Do you have any idea how amazing it can feel when a medical professional tells you they are going to help get it the "root cause" of why you've been feeling increasingly terrible? Let me just say it feels like a miracle. And after several months, I know I'm healing and I feel like a new person. Yes, it's expensive, yes, the supplements are pricey, but it's worth it. When I think of how much more I paying with my health and happiness by feeling terrible and no longer able to do the things I love, it's a trade off I'm willing to make. Especially after spending so much time and money trying to find someone who would and could help. I can't wait to see how I feel months from now! read more

I have been a patient of Dr. Mark for some time. He is understanding, caring and has been very thorough in analyzing my GI issues. I appreciate that he takes a whole body approach and considers non pharmaceutical options in the path to healing. I would definitely recommend him if you are looking for a deeper and more personal level of care. read more

This is a reply to the response from Frances M, one of the business owners, to my initial review. So you're saying that you believe $500 for 30 mins is reasonable for a conversation about whether I can afford or actually need the long-term root cause approach to my health conditions? I had a discovery call with you prior to this consultation and you told me that my case was the type of case that your clinic works with all the time. This is why I decided to pay the $500 because I thought I would get an individualized plan. I have had consultations with other functional medicine practitioners and naturopaths before and this appointment was used to build a plan for me. Not listen to a sales pitch. I found out the cost for these other providers' programs during the 15 minute discovery call. And by the way, you are not telling the truth about offering a $35,000 program. You said "For accuracy, we don't offer a $35,000 program". I have documents to prove that you do, which I've posted here. There are three tiers I was offered: Platinum 12 month program, a Gold 12 month program but not as many "perks" and visits, and then a 6 month program, which I was deterred from because I have a lot of issues and it takes time to resolve (which I agree with). And all of these programs don't include labs or supplements!! I was being steered towards the Platinum program for 35k, BUT if I signed up before 7/30/25 and paid in full, I would only pay $25k! Heck of a deal! "Spots are limited! Fast Action Bonus if you sign up today!" Seriously this is what you hear on an infomercial or used car sales lot. You are clearly just motivated by money and not helping people. I am so frustrated that I spent my VERY hard earned $500 (which I desperately need to work on getting better) and got absolutely nothing but scammed. You both should be ashamed of yourselves taking advantage of people who are desperate to feel better. Your reply was unbelievable. Literally. read more

All Functional Health - This is the $35,000 Platinum program that isn't offered at this clinic, according to the business reply to my initial review. Seriously?? - Gastroenterologist Near Me - San Ramon, California

I think DR Mark is wonderful smart man. I lost 30 pounds with the supplements he suggested I take. I saw him for over a year. I stopped going because his wife kept changing the prices on me. I went from paying $400 a month to $600 a month. The supplements I bought would change prices all the time. Thats no way to treat patients that that keep coming back. read more

Dr. Mark has been my treating physician for over 10 years. I've received excellent care during my treatments and recommended health supplements to improve and/or remedy related GI issues. i recommend his office and medical team. read more

Dr. Mark is very personable and answered all my questions. His explanations are easy to understand and make sense. His suggestions for minor daily routine changes that can/will help with my gut health are not difficult and make sense. read more

Love Dr. Mark! Very personal doc and has helped me in so many ways! Highly recommend!

Dr. Mark is highly qualified and kind. He is willing and open to suggesting natural or vitamin therapies when appropriate. I like the fact that pharmaceuticals are not his only approach. He's a good listener and sensitive to patient concerns. read more

Dr. Mark has helped me loose 18 percent of my weight, increased lean muscle, and feel better than I felt for 20 years. Dr. Mark and his All Functional Health program has a very customized health and weight loss plan that works. I would like to recommend talking to him to see how he can help you achieve your health and weight loss goals. read more

I came to Dr. Mark with a hiatal hernia, severe acid reflux, SIBO, and unidentified food sensitivities. Basically my guts were a mess. Dr. Mark is an expert on herbal remedies for the gut, with a wide range of customized combinations of pharm-grade herbs, each combo designed to accomplish specific goals in your GI tract. With the help of several of the herbal combo's, the occasional prescription drug, and a home testing device that links with your phone and his office and allows you and him to track fermentation levels and adjust treatment on an ongoing basis, Dr. Mark has helped me get totally back to normal, something I didn't think was possible 10 months ago. At this point I only take two supplements a couple times a week for maintenance, and haven't had any acid reflux, or any of my other symptoms in a couple of months, and I feel great! I consider myself very lucky to have Dr. Marks help. read more

I'm really lucky I found you as a healthcare provider. I've been seriously ill since 2007 and I've probably seen close to 100 healthcare providers, but I haven't found anyone who's been able to help me on the road to recovery like you and Dr. Mark. read more

Wow! I am quite disappointed with my experience. Over the course of numerous months I was peddled a bunch of over priced "natural" meds that were not covered by insurance...fun fact, these are all products sold and packaged by Dr. Mark's business. Dr Mark's charges an exorbitant fee for a 15 minute appt. The connection almost always has poor connection. He also rushes through call trying to end it as soon as possible. I have since moved onto another doctor. When I called his office requesting a copy of my medical records, they insisted the only way they would give them to me is if i paid $30 for them...ie holding my medical records hostage. There are numerous GI docs out there, please find someone that actually has respect for their clients read more

I have been dealing with SIBO/SIFO for years and have seen multiple specialists who were unable to help me. I am so glad that I found Dr. Mark, who helped me better understand my condition and tailored a plan for my recovery. I am even more grateful during this holiday season, as I have been able to enjoy foods I haven't had in years because of his care. I would highly recommend him to anyone in need of a GI specialist! read more

This review is not about the DR but about the dr's office. The doc is great. He treats his patient well. But the dr office is not so good. They charge you deposit and deductible even when your just supposed to pay co-pay. And when your insurance is covering most of the payments. So be aware of what they charging you. If they are charging more then copay better start asking questions of why you have to pay the additional charges. I just want people to know. Because money don't grow on tree. read more

Today was the second time I had a scheduled a follow up appointment with Dr. Mark and he is over an hour late. My first follow up appointment he was an hour and a half late. His office is quick to call you to get their payment but as you're sitting around waiting for the doctor to send you the video link, your whole day is gone. I understand that things are chaotic with COVID-19 but Dr. Mark needs to do a better job of communicating to patients that the doctor will be SUBSTANTIALLY late to his appointments. I'm done and taking my business elsewhere!! read more

Over the years I've visited many medical practices, with varying approaches to getting to the source of the health problem; vs. those that only treat the symptom without addressing the causes. Dr. Jeffrey Mark and Dr. Fran are by far the most knowledgeable, smart, and technologically forward thinking, and practicing practitioners in the Bay Area.. They use so many state of the art tools. They're constantly going to conferences to learn about all the emerging ways to really help people to be healthy- much more so than most other doctors. They really know how to interpret lab values - using cutting edge, sophisticated lab analytics - to determine all the contributing factors involved- to come up with a very complete and comprehensive way to not only fix my health problems and symptoms, but most importantly also get to the root of why, along with and all the contributing elements to the problem. I am so pleased and happy with trusting my health with everyone at All Functional Health. Every visit I feel like they truly care about helping me get better read more

Stay away. Stay far away. Unless you love a doctor that does not treat your time with respect and an office with incredibly bad (read borderline illegal) billing practices. I saw Dr. Mark in late 2016 and early 2017 for hemorrhoid issues. While his treatment ended up resulting is a good handful of years of reducing the problem, my experience with him and his office both during and after my care there was subpar at best and absolutely terrible at worst. I had to have a handful of appointments for my treatment and for each and every one, I had to wait quite a while past my appointment time. Most resulted in about a half hour waiting time. But, one appointment had me wait to see him for one and a half hours. One and a half hours! And when he finally walked in, he gave not a single word of apology for having made me wait with absolutely no information for such a long time. I understand that appointments run over but to not even acknowledge my lost time was incredibly disrespectful. I finished my treatment and have not returned since. Fast forward 5, yes 5 (five) years and I get a call from his office (which has now changed names several times) saying that my bills will be going to collection for non-payment. I freaked out because I had no idea that there were any unpaid bills. For context, I was living with my parents at the time and could not cover all the costs myself as a young adult with an entry level job, so my parents were footing the bills. I actually left town and moved out of state shortly after my treatment finished and my parents were just going to pay the bills as they came so I did not track very closely. My parents are always very good about paying bills on time so I was very confused how not a single bill from my treatment had been paid. I assumed it was an error and dove deep into records. My parents found no record of ever receiving or paying these bills. Had it just been one bill that had been missed I would have chalked it up to human error, maybe my parents missed one - it happens. But this was all 6 bills covering every visit I had the the few months I went to see Dr. Mark. There is no way that my parents missed 6 separate bills AND any bills that might have been resent. I came to the conclusion that we were never actually sent these bills. When I asked why I was only hearing of this after 5 years, I was told they were cleaning up their records. So, basically, they never sent the bills and were just trying to recoup damages. They would not admit this, of course and were steadfastly adamant that I was the one who messed up, not them. They would not provide me with proof that they had ever sent the bills and all my statement dates were from one month before they called me. I had to call my insurance to even get correct billing dates since the ones Dr. Mark's office had were not even correct. They tried to pass this off on the fact that they got a new filing system and could not get information from before then....how professional. I tried to settle with them since legally I did not have to pay as I was past the statute of limitations in California (4 years) but they refused to allow me to even speak with the billing manager (Dr. Mark's wife - she will deny it but her own staff say she is the manager) and simply demanded I pay or these bills were going to collection. They constantly gave me the run around as well as totally ridiculous reasoning for why they could not do this or provide info on that. Even getting through to the office was hard since I would have to wait on hold for a minimum of 10 mins each time before speaking to anyone. I went so far as to reach out to lawyers about this mess because everything was incredibly bad business practice. In the end I paid because the stress of it all was too much at a time when I was moving and because the charges were ultimately legitimate and for treatment that was partially successful (I still have the same issues reoccurring but not as bad as before treatment). I also did not want to deal with a debt collector nor did I want to risk my credit score being hit for THEIR mistake, especially at a time where I was looking to buy a car and rent an apartment. BUT, I never once got an apology from them or any admission that they mucked it up. Not once. They care about getting their money and nothing more. So, stay away. Bad doctor, bad office. Never, ever going to even come close to this place again. read more

Dr Mark TRULY cares about his patients. He takes time to listen and always tries to find out the ROOT CAUSE of your problem versus covering it up with medication. I really like that about him. And that's really important because our bodies can often times heal ourselves when a good provider helps us figure out what's wrong and gives us honest and healthy guidance. The staff is also extra friendly and helpful. They really work together as a team and it feels good to be around all that good energy! read more

Horrible customer service. I had to call multiple times to get an overview of my appointments or some kind of agenda and I NEVER received it after both appointments. I would have to call 5-10x a day because no one would answer. I don't think this doctor cares about his patients. He will tell you " a plan " but does he actually help you execute this plan? Lol I was always left SO clueless. This whole office just seemed a MESS. I paid a lot for all of my test and there were no real answers or a diagnosis as to what was going on. PLEASE DO NOT WASTE YOUR TIME. Go to a more thorough, attentive doctor. Such a waste. -Sharyce read more

Dr. Mark is a most knowledgeable gastroenterologist whom I and my husband have been seeing for years now. He has treated me through a couple of serious illnesses and performed important screenings which have revealed serious toxicities and infections. He has prescribed supplements and dietary advice as well as medicines for healing and wellbeing. He and his staff have given us friendly as well as expert care and we highly recommend this practice! read more

10/4/2019 My review of All Functional Health is my experience of the last 4 years. I am 71 and feel internally healthier since my childhood. Please think about how you can actually feel, healthy! And, looking as you really want too see yourself. You owe it to yourself. Again, I speak first-hand; Dr. Mark has been correcting years of "life" damage that I (we) do too self. Qualified is an understatement. Your complete body is taken into account. Correct what's causing the issues! Best regards, it's your body. Own it, care for it with proper attention. Love it and life Thank you from my heart; my new life.... Barbra B read more

All Functional Health - Dr. Jeffrey Mark restored my health. I looked like death; to look like this. - Gastroenterologist Near Me - San Ramon, California

Dr. Jeffrey Mark is a kind and helpful person who really wants to help me feel better. My lack of energy and general feeling of unwellness has started to decline. I'm looking forward to a time when I get up in the morning and feel great! I feel that we are on the right track to accomplish that. I would recommend Dr. Jeffrey Mark for those of us that don't do well with allopathic medicine. read more

Supplements they offer are really AMAZING. I'm currently taking the M5 shake, I love to take it for breakfast and/or for lunch. It has a great Vanilla taste, and I also like to mix it with my fruit smoothies which adds a delightful taste. Even better it is a VEGETABLE BASED PROTEIN! Can't go wrong with any of the products they offer. Would really recommend everyone to give them a try, especially the M5. Thank you for the wonderful products and I can't wait to get more read more

The office has the worst customer service and office staff I have ever experienced. Dr. Mark's wife, Dr. Frances, takes everything personally when you don't book the appointments she thinks you need. It is all about money. They don't return phone calls or emails promptly but have no problem calling to ask for payment before the doctor appointment. After all the mistakes, they gave me a gift certificate to use then refused to let me use it. Since I would not book all the appointments Dr. Mark's wife wanted me to do, they sent me a rude letter dropping as a patient. Who does that? I spent over $2,000 with them with no results. They just want to see their products to you. Its horrible. However, Dr. Mark is very nice and I think wants to help but it is his staff that breaks them. read more

I am truly impressed at Dr. Mark's professionalism and knowledge. He is so well versed in functional medicine and was able to explain things to me in very simple and understandable terms. He takes the time to get to know your issue and get to the root cause of your problems. Dr. Mark also has a fantastic bedside manner. He and his wife Dr. Frances make an excellent team. I highly recommend them. read more

This business is extremely unprofessional. When I originally made an appointment the office did not seem very organized so I had a conversation with them about how their communication and follow up worked. The woman I spoke to assured me that they were very responsive to their patients. Unfortunately after my second appointment, which I payed $696 out of pocket for, I found that this was not the case. After they got my money I did my online appointment with Dr. Mark and he ended up being a little over 30 minutes late. There was no heads up from the office. I had to keep calling before I could get an answer from anyone. They told me that they could not estimate when and if Dr. Mark would be late to his appointments and there would be no heads up. Dr. Mark seem to have good knowledge about his work but the system in which we communicated on made it difficult as I could barely hear and the video kept cutting out. Two weeks later I still have not gotten my super bill which I was promised to give to insurance. I was emailing multiple times as well as calling multiple times and left voicemails. When I finally got in touch with someone through email they sent me a super bill for only part of the cost which I paid out of pocket. I called the office again and the phone was ringing for five minutes straight before I finally got in touch with someone like every time before. I don't know if they are adequately staffed or not because it seems they are unable to answer the phone most of the time when I call even after a long time has passed. I finally spoke with a man about the super bill and he told me that part of the cost was for the living matrix which was nonrefundable and not able to be billed to insurance. This contradicted what I was told by the representative I had spoke with before I paid for my appointment. She had told me that the entire thing was going to be included for the super bill. He told me that I needed to look at my agreement that I signed for my financial responsibility. I had seen that however their representative assured me that the living matrix would still be on the superbill so I took her word on it. I even made sure to clarify with her. The man I spoke to kept re-stating to me that I had in fact received a super bill and I told him that I acknowledge I received it however it was not for the full amount. He kept going back to the point that I still got a super bill even if it was not a full amount. The super bill itself is still not correct because I need a tax ID in order to submit it to insurance which it does not have. The real issue here is that I was assured by the representative that I would be reimbursed for the full cost even with the paperwork that was presented which I clarified with the representative and they are not willing to take responsibility for their miss information that they have given me. To summit up the issues I am having is the lack of communication, the lack of responsibility taken, and the dishonest charges. The man repeatedly told me that the front desk is not responsible for billing so they can't be held accountable for their miss information that they give patients. This practice seems extremely shady and I wish I had trusted the reviews on their yelp page more. I have never been to a clinic where people are so unprofessional and unwilling to take accountability and responsibility. read more

Dr. Mark helpful with my stomach pain and inflammation. Great that he made tele sessions available during COvid isolation read more

Dr. Mark has really helped me to have a happy gut at last! I highly recommend his services. This has also been the best practice I've been to where you are always greeted with a smile from all members of the staff. At the front desk is Mimi, she is very pleasant and helpful. Dr. Mark has such a positive spirit about him. I appreciate all the knowledge he's shared with me in how to make smarter food choices to my bodies benefit. Many thanks Dr. Mark! read more

My mother had brain surgery 4 years ago and ever since then it's been a battle to find her a specialist who can recommend supplements that can help her heal without prescription drugs. We made a functional medicine appointment for her with Dr.Mark and he immediately knew what to recommend for her. This is the first time in 4 years that my mother did not have a bad reaction to new supplements she tried and she actually says that she feels better when she takes them. For my family, this is great because its one step closer to helping her body heal without prescription drugs and this has been a 4 year battle. I just stocked up on supplements for her actually. Its the perfect combination. This place has their own supplement line which is awesome! read more

Horrible experience. I was referred by my primary for my daughter. It appeared the young man checking us in barely knew what he was doing and was proceeding to train a young lady!!!??? Didn't ask me for my insurance card I had to ask if he wanted it. He never gave me the paperwork to fill out even though I got there early to do so. I ended up having to fill them out in the room. Another thing I found odd was they sell skin care product...At a gastroenterologist??? Then they got her gender wrong, the doctor wanted to verify she was 11 years old. What??? They got her birthday wrong but come on you can tell she isn't 11. They wanted to put my daughter on some sort of natural remedy for ADHD...Again, at a gastroenterologist??? I was just done. So not impressed at all. read more

We had a horrible experience with Dr. Mark. First, my mom had a medical procedure which required specific instructions, the staff and Dr. did not provide any prior instructions and left the patient to figure it out on their own. After the procedure, Dr. Mark said one sentence to my mom and did not go over anything else, despite us asking. 2 weeks later, we had an appointment for the results and Dr. Mark was running 1 hour late. We requested a Zoom call and not a phone call. Dr. Mark called on the phone instead. On the phone, he tried to rush my mom and wanted to end the conversation within 2 minutes. We waited for 1 hour and the Dr. Mark did not want to answer our questions and clarify the results. He kept trying us to book another appointment but under a "Functional Med appointment" where we would have to pay out of pocket. He also kept trying to push his herbal medicines. When we asked him specifics on his herbal medicines and the purpose of a functional medicine appointment, he said that the "girls the the front desk" will explain this to you." We will wanted a response from the Dr., not a sales pitch from the secretary. We never received any actual medical advice. I would not recommend this MD if you are looking for caring doctor who will give your more than his 3 minutes of time. The called ended abruptly with no answers, but confusion. read more

My experience with Dr. Mark was outstanding. I was referred to Dr. Mark by my ENT and I knew immediately that I was in good hands. He really took the time to listen to my concerns and he answered all of my questions. I was very impressed by the amount of time and the personal attention that I received. I did not feel rushed nor did he make me feel bad for asking so many questions. He was so kind and patient with me and I really appreciate the follow up that I received from he and his office. read more

The staff is amazing! Friendly, helpful and go above and beyond. Dr. Mark is very knowledgeable, thorough and can suggest supplements to help, not just pharmaceuticals. read more

After Will Lane, MD retired I needed a new GE to help manage my ulcerative colitis. I've seen Dr. Mark twice and he is one of the best MDs I've ever seen. He has suggested tests Dr. Lane never imagined to better titrate my meds and manage my disease. He is very smart, upbeat and seems to take a personal interest in making sure my UC doesn't flare up and that the SE of my meds are managed appropriately. He has taken a more holistic approach to my UC and suggested some dietary restrictions. They have worked miraculously and I am now off prednisone for longer than I have been in the past 8 years. I highly recommend him. read more

Over 1 hour wait for the doctor on 3 different visits here. When I did see him he was in a rush to get me out the door and asked me to ask any questions I had while he walked me out No bedside manner at all. Further, the staff was extremely unfriendly and rude on both occasions. Later, when I called up to pay a bill, they took my credit card number and just disconnected leaving me hanging with no confirmation. Also, be aware that they charge you approx 2% extra for using credit cards for visits to the doctor. First doctor's office where I found them scrounging for the credit card surcharges. I was referred here by my general physician but will be looking for another GI doctor immediately read more

My first colonoscopy was with Dr Mark just over 10 years ago. He was very attentive and pleasant as is the rest of his staff. I have GI issues which I deal with through diet and his office has a full line of products for my issues and other issues as well. One product I use and have actually bought for others is the Vegan Meal. It is both satisfying and tasty. I would highly recommend Dr Mark for anyone looking for a kind and knowledgeable doctor for their GI but also for the supplements that the office offers. read more

This review is past due. I have to say before coming to Dr Marks I went all over town trying to find someone who could help me with my hard to diagnose stomach issues. I had Dr Rowe who was extremely angry/ rude belittle me, Dr Shelby who wanted to scope me the next day without asking any simple questions (later I learned this guy scopes everyone and their mom for fast cash), and Dr Friedman who needs to retire ASAP. Dr Marks was referred to me on Nextdoor and wow he's such a breath of fresh air. He is very attentive, dedicated, and compassionate. I think best of all for me he is educated in both naturopathic and traditional medicine, so he gives you both perspectives. So many Dr's don't know enough about nutrition and good supplements and tend to push prescription drugs on their patients. I highly recommend Dr Marks and I am so grateful I found such a caring and thorough Doctor. read more

Dr. Mark is an exceptional physician. He is not just a gastroenterologist. Dr. Mark looks at your entire bodies wellbeing. He can assist you in restoring your body to a healthy state with functional medicines. He does not just order RX's, he knows what to look for and does the appropriate tests to determine what exactly is wrong; no guessing games. His extensive education is both in Western and Eastern medicines. He prefers natural medicines that are targeted for your specific issues. I was dying from a severe bacterial infection. Dr. Mark found out exactly what damage was done throughout my system, and set out to heal me. He has accomplished that with time. He knows exactly how to restore your body, and if you follow his advice; it will happen. I like that he has in stock the medicines that one would need, purest quality. His focus is also on the aging process and can assist an aging body to be stronger and more youthful. His wife is a pharmacist and she searches for the purest skin care products to assist with aging. Also available in the office. I can not believe how these products have restored my skin. I look youthful, for a 70 year old woman. You owe it to yourself if you have health issues to go and consult with Dr. Mark. Mind you, his office can be busy. Have patience with staff. You will be seen by the best Dr. around. read more