Finally Overcome Your Root Cause With Erez Functional Medicine in San Diego
If you're tired of managing symptoms and want to get to the bottom of your health issues, you're in the right place.
Sound Familiar?
Traditional healthcare says "everything looks fine"
If all you hear is 'it's all in your head,' or 'just keep doing what you're doing,' it's time for a new approach.
Traditional Healthcare
Erez Functional Medicine
Meet your Doctor
Hi, I'm Dr. Aaron Erez
When I began practicing in the traditional healthcare system, I could only meet for minutes and manage symptoms for my patients. I knew right away there was more to medicine.
Today, each patient I treat has their own uniquely complicated case, but they all share one thing in common: they were once healthy.
I aim to understand what caused your ill-health, and through my 11+ years of experience, I've developed a knack for finding clues, knowing what to test, and prescribing a comprehensive, yet targeted treatment protocol to help you feel your best again.
When you work with me, you get a true health partner, not a revolving door of providers.
Patient Reviews
Don't just take my word for it
I’ve worked with Dr. Erez for over three years now. I value his cash based model providing a high quality of care and value. I find it far more effective and impactful than the traditional health insurance care system. I can accomplish so much in one meeting and I’m not forced to have multiple visits. This saves me time and ultimately I feel it saves me money and most importantly I get the care I need reducing my pain, stress, and making me a healthier more vibrant person. Dr Erez is very thorough and knowledgeable and he’s focused on the standard of wellness and care you want to reach. He’s very focused on you and is open to pursuing what you need for your health while providing his excellent opinion and transparency around costs for additional tests and services. He cares a lot about you. It’s easy to schedule a visit with him or email/message him with timely responses. He has been instrumental in helping me increase my energy, decrease pain, and being more vibrant of a person working through various gut issues.
I have been a patient of Dr. Erez for the past year. He is incredibly knowledgeable, thoughtful, and patient. He truly cares to understand my situation and work with me to find solutions to my health challenges which honor my priorities and personal values. Dr. Erez Is more helpful than my endocrinologist, my rheumatologist, and my dermatologist combined. In fact, he has replaced all of these specialists. Using careful evaluation and detailed bloodwork, he has caught issues that could later lead to difficult diagnosis and provided me with a preventative strategy, using supplements and lifestyle changes. I highly recommend him for anyone who is dealing with complicated health issues. He is truly a one-stop shop for all health and wellness needs!
Been working with Dr. Erez for over a year now and have made health gains. Functional medicine allows a deeper dive and more holistic approach that compliments and often goes a step further than traditional medicine.
I really appreciate what Dr. Erez and his staff, Bing and Michelle, have done for me. I feel I’m under excellent care, I’m listened to, I’m protecting my health and preventing future health issues. Dr. Erez is supportive, motivating and extremely knowledgeable. I’m very happy I’m under his care!
Dr. Erez is a breath of fresh air ! After going to countless specialists, who often only wanted to treat my symptoms, he looked at my body as a whole to get down to the root cause of my health issues. He truly listens and in doing so, has helped me find solutions to wellness through proper testing, vitamins supplements, diet and stress reduction.I cannot say enough good things about my experience with Dr. Erez I am grateful for his care and compassion in helping me to feel better .
Absolutely the best!!! Listens to your concerns and helps you with reaching your fitness and health goals. Great support staff. Highly recommend. Thank you Dr. Erez
It won't be an overstatement when I say Dr. E saved my life! While working with several GI's and other doctors over a course of 4 years none of them took any of my health complaints seriously and refused to run tests for diagnosis. Dr. E is the first doctor in my experience who took the time to understand my health concerns without dismissing them and prescribe appropriate tests. I have been suffering with chronic bloating , nausea, stomach cramps, occasional constipation , anxiety etc. After years of struggle I was finally given a substantial diagnosis .I am now being prescribed specific medications/supplements necessary for my condition and in a month's time I have observed incredible changes in my health! I will continue working with Dr. E as I heal myself and feel my best again. He takes a holistic approach to healthcare, and seems to be very well informed on current research and treatments . He genuinely cares about his patients and is always very encouraging ! I feel fortunate to have met an amazing Doctor whom I can trust . Thanks a lot Dr. E !!
My experience so far with Dr. Erez has been unlike any healthcare experience I’ve ever had. He is incredibly patient (with my *many* questions), knowledgeable and thorough when looking into possible root causes of symptoms. Because of him, I’ve been able to start getting some answers for symptoms that have been brushed off by doctors for years at this point. He takes an integrative approach and helps me focus on the most natural remedies for my issues, which I requested and prefer to the medicines that traditional doctors normally give you. He is definitely a doctor who genuinely cares for his patients and wants to see them be their healthiest selves. If you’re in the San Diego area and are looking for a functional medicine doctor, I would highly recommend Dr. Erez!
Dr.Erez help has been a literal answer to prayer. After working with 3 different OBGYN doctors over the course of 2 years for issues with postpartum depression/irregular periods/ hormonal and GI problems my family and I finally have seen progress in my overall health. Dr Erez did an in depth overview of my hormones that pinpointed my exact deficiency. I am now being prescribed specific medication/supplements to meet my body’s needs. Prior doctors prescribed me birth control patches with added hormones that unfortunately caused more distress. If you’re struggling to find answers and help with traditional medical approaches go see Dr Erez. He’s kind, approachable, and knowledgeable - I’m so glad to know this phenomenal doctor.
Dr Erez is a life changing Doctor! A few months ago I was looking for a functional medicine Doctor and came across his website. I’ve been seeing him (virtually) for a few months and he has truly changed my life. The initial appointment was great as he spent a lot of time understanding my history, and more importantly my motivation. He then carried these 2 things into his plan for me which included changing the way I eat and workout. He got me set up on a CGM so I can understand how my body responds to various foods (talk about accountability!) along with supplements that were based on my initial blood work. We did follow up blood work about 45 days after the initial and the results were pretty spectacular. It included no longer being pre-diabetic, dropping my cholesterol by 25% and losing 15 pounds. This is just the start of me getting to my maximum health- and I could not do it without him. I tell everyone about him (who is willing to listen :-)). And my wife now goes to him as well. If you are on the fence about going to see him, do it. He leads with care and science.
Dr. E has been fabulous in guiding me through a reversal of my osteoporosis condition at age 70. With his advice on appropriate supplements, exercise, and diet, my bone density and health metrics are steadily improving. A great guy. I use his services to augment my Kaiser membership which only provides basic non-functional medical guidance. Dr. E goes many steps further than Kaiser to understand the "why" and not just the "what" to fully resolve my health issues based on the most recent studies. He is very knowledgeable and great to work with. Thanks, Dr. E!
Dr Erez is great!!! He quickly and efficiently got to the root of all my problems! I would have never figured it out without him!
How It Works
At Erez Functional Medicine, your health journey starts on day one
01
Full Intake
First, I ask that you fill out your comprehensive intake and upload labs from the last 12 months.
02
Clinical Review
From there, I review your intake in full before your visit to identify any red flags other doctors missed.
03
Jumpstart Items
You'll receive specific action items to start on before your first appointment — no waiting to make progress.
04
Partnership
Our partnership begins with quarterly appointments and direct communication in between.
Quarterly Care
Deep healing, not quick fixes
A quarterly care plan keeps us ahead of your health — proactively managing, optimizing, and adjusting. And with email and text access between appointments, questions get answered in real time, so nothing stalls between visits.
Quarter 1 · The Foundation
New Patient Deep Dive
The Goal: Map your history, order comprehensive labs, and build your initial roadmap.
Quarter 2+ · Optimization
Ongoing Support
The Goal: Review data, identify root-cause triggers, track progress, and adjust until the numbers move.
My Promise: If you attend your 60-minute New Patient Deep Dive and do not feel you have a clear understanding of your health map or a tangible plan of action, simply notify us within 24 hours of your appointment. We will refund your money without question.
Why Choose EFM
What makes this different from everything else you've tried
01
🚫 No Guessing What to Eat or Take
Navigating supplements and diets is overwhelming. We curate your entire regimen and send you direct links so you don't spend hours researching what to buy or wondering if the quality is good.
01
📱 Direct Access to Your Doctor
When you need me, you can reach my by emailing or texting me directly. No phone trees, no front desk runaround.
01
📈 Your Health, Tracked Over Time
Most doctors look at labs in isolation. We track biomarkers over time, catching subtle trends before they become major issues.
01
🔗 Connecting the Dots
You've likely seen specialists who only look at one body part. We connect gut health, hormones, and immune system to treat the whole person.
01
🧾 Comprehensive Insurance Support
We provide a ready-to-submit Superbill. If you have PPO insurance, we utilize it to cover labs whenever possible. We fight for Prior Authorizations so you don't have to battle the system alone.
Book Here
Ready for a Different Conversation About Your Health?
If you’ve spent thousands of dollars on supplements that didn't work, felt dismissed by the traditional medical system, or are simply overwhelmed by where to even start, this call is for you.
I know you aren't just looking for another doctor. You’re looking for a partner.
This 15-minute intro session is a zero-pressure space designed to provide the clarity you’ve been missing:
- Financial Cost: We’ll discuss the reality of costs upfront. No hidden fees. My goal is to stop the cycle of trial-and-error spending and focus your resources on testing and treatments that actually move the needle.
- Navigating Insurance: Whether you have a PPO and need a superbill for reimbursement or you’re navigating the limitations of an HMO (like Kaiser), I will be honest about what is possible so you can make an informed financial decision.
- A Path Beyond Prescriptions: If you’re tired of being "managed" by medications or fear being on them long-term, we’ll discuss how a functional approach targets root causes to help your body regain its own balance.
- The Why: We’ll briefly look at your history to identify why previous treatments may have failed and how our partnership-based model is different from the practitioners who have let you down in the past.
Featured Patient Story
From Prediabetic to Half Marathons
His goal was simple: a healthy BMI and a body that let him hike and travel again. Less than a year later, he'd lost 91 pounds, reversed his prediabetes, and was training for half marathons.
Frequently Asked Questions
Everything you’re wondering, answered directly.
I focus on the complex, chronic issues that the traditional system frequently dismisses or mismanages.
Most often, I am helping patients navigate debilitating fatigue, unexplained weight gain, and chronic digestive issues like SIBO or GERD. I also spend a significant amount of time treating hormonal imbalances and thyroid conditions—especially for people who have been told their labs are "normal" even though they feel terrible.
My practice also covers brain fog, anxiety, sleep disorders, and autoimmune conditions like Crohn’s or Hashimoto’s.
Whether you have a formal diagnosis or you’re just struggling with persistent symptoms like skin rashes or low testosterone, my job is to act as a detective and find the underlying triggers that others have overlooked.
Conventional labs are designed to find disease, meaning they usually only flag a result if you are already in a state of crisis. I look for optimal functional ranges. You shouldn't have to wait for your check engine light to illuminate before we take action. I look for the subtle shifts in your biomarkers that explain why you feel exhausted or foggy right now, even when the system says you’re "fine."
I am not anti-medication; I am just against using them as permanent band-aids. If a prescription is the best way to stabilize you and provide immediate relief, we will use it. However, my goal is always to investigate why you needed that medication in the first place.
By addressing the root cause of your symptoms, we can often work toward a point where your body maintains its own balance with as little intervention as possible. You are a full partner in these decisions, and we always aim for the most effective, least invasive path to getting you back to feeling like yourself.
Most of my patients arrive here after getting stuck between two extremes. They’ve usually seen specialists who only focus on one organ and offer a pill to mask a symptom, or they’ve seen naturopaths who rely strictly on herbs and supplements, sometimes missing the clinical complexity of the case. I occupy the space in between.
As a Board-Certified D.O. with over 11 years and 10,000 hours of patient care, I don't believe you should have to choose between modern science and natural healing. I use whatever tool is most effective for your specific biology, whether that’s a targeted prescription, advanced peptides, or a shift in your daily habits. Because I run a one-person practice, I am the one personally reviewing your history and labs to connect the dots that siloed doctors often miss.
Yes, but I want to be completely transparent: HMOs generally do not cover my visits or the advanced functional testing I use. Many of my patients who have been through the ringer with Kaiser find that investing in a clear answer is more cost-effective than another year of trial-and-error. I will always be upfront with you about costs so there are no surprises.
If you have a PPO, I will provide you with a Superbill after our appointments. You can submit this to your insurance provider for potential out-of-network reimbursement. While I can’t guarantee what they will cover, I will fight for Prior Authorizations whenever possible to help get your labs covered by your plan.
I currently run a 100% virtual practice. This allows me to give you my undivided attention from the comfort of your own home. I am currently licensed to treat patients in California, Oregon, and North Carolina. If you live in or move to any of those states, we can continue our partnership without interruption.