About Thrive Clinic in Corvallis, Oregon | The Thrive Clinic
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The Thrive Clinic, Functional Medicine in Corvallis, Oregon

About Thrive Clinic

A Note from Dr. Sievert

I was admitted to our local Hospital in Germany with what turned out to be a torn ligament in my knee. It was after hours and the young doctor admitting me told me I was going to be a cripple now for life. I now know he probably meant well, wanting to scare me so I would not ever ride a motorcycle again- but I had the worst night and didn’t get a wink of sleep.

The next day the doctor’s supervisor told me this could be addressed with routine surgery. During that hospital stay I decided that I could do better than that fellow, if only for having empathy.

I went on to study medicine at the University of Düsseldorf at the Rhine river where I lived and aimed to become a cardio-thoracic surgeon. I began the 6 year long residency in Duisburg, Germany only to realize soon that this was not what I thought I should be doing: It felt like it was too late in the “game”, as these patients were already so sick that, indeed, only surgery could help them. Yet all it did was buy them some time, their disease was too advanced to really make them well. I wanted to intervene earlier, when there would be an opportunity to expand the patient’s health span (the life in your years) rather than just their life span (the years in your life).

That’s when I decided to go into Primary care.

Around that time I had met my wife Annette. We decided to emigrate to the US and after residency and employment in Margaretville, NY we moved to Corvallis.

I began working for the Corvallis Clinic in North Albany in 2008 as a Family Doctor. For a long time I had the feeling that conventional medicine was missing the mark when it came to chronic disease. The epiphany came when I myself was diagnosed with Hashimoto’s disease, a condition where the immune system starts attacking the thyroid gland. I did everything the conventional approach would entail but, even though all standard laboratory markers normalized, I did not feel any better. I still was severely fatigued, had joint pain all the time and at the age of 47 felt very old.

I have since discovered and trained in Functional Medicine, which helped me find the root causes of my condition and resolve them or reduce their impact. Today I am symptom free and only take a third of my original dosage of thyroid hormone.

I began incorporating Functional Medicine into my standard primary care practice and ultimately decided to start my own office.

I founded The Thrive Clinic to be able to provide uncompromising Functional Medicine, to realize its full potential. I invite you to take a look at the video on the page linked below from the Institute of Functional Medicine to learn more.

Watch The Video
Dr Sievert has been our physician for approximately 15 years. He is without doubt the best physician we have ever had. His work has been of great value in assisting us with some severe medical issues. He is great at helping cure illness, however what we appreciate most is that his focus is to help keep his patients healthy in order to prevent disease. He advocates for a lifestyle that will help us healthy. Plus, he's a great guy!Increasing my stomach acid, finding out my food allergens, adding supplements to my diet that my body needed, (low stomach acid does not allow your food to be broken down and absorbed properly.). Adjusting my thyroid meds to an optimum. You have to want this to make this work. Its powerful because it really is up to you. I like this analogy...Dr. Sievert will hand you the music...you just need to learn to play. LISTEN to his advice it will change your life!
Will and Patty Crawford
I was diagnosed with COVID-19 back in November of 2020. Months had gone by with little to no relief, I was unable to go back to work full time, I was short of breath, had brain fog, chest pain, losing my voice, extreme fatigue and much more. I had a friend recommended The Thrive Clinic. I had already seen many doctors, had multiple tests and studies done and nothing was working. I had nothing else to lose at this point. I made the appointment and took my husband with me. I explained all that was going on with me and Dr. Sievert was certain he could help me. I was skeptical at first by his confidence because nothing I had done so far had helped. Sure enough, I had results within two weeks and was back to normal by about six weeks with his approach. I highly recommend his care to anyone. His knowledge is outstanding and he absolutely puts the patient first. Thank you for changing my life and helping me to make a full recovery. Bless you. Increasing my stomach acid, finding out my food allergens, adding supplements to my diet that my body needed, (low stomach acid does not allow your food to be broken down and absorbed properly.). Adjusting my thyroid meds to an optimum. You have to want this to make this work. Its powerful because it really is up to you. I like this analogy...Dr. Sievert will hand you the music...you just need to learn to play. LISTEN to his advice it will change your life!
Sheri Prieto
Mysteries...great for a novel not so great for your health. My journey has been filled with health mysteries. Gastro intestinal issues, swollen lips, tearing eyes, palpitations, rashes, hormonal swings, stiff swollen muscles, fatigue, nausea, repeated infections, too many symptoms to note. I was at the bottom of the well. Dr. Sievert helped me climb out of that mysterious well. Rung by rung...remember it took me YEARS to get this sick...now I am one rung from the top of the well. I am 62 and feel better than I have in many years. I look and feel younger than most people my age. Dr. Sievert can give you the tools but you have to use them! The big game changers for me were: Increasing my stomach acid, finding out my food allergens, adding supplements to my diet that my body needed, (low stomach acid does not allow your food to be broken down and absorbed properly.). Adjusting my thyroid meds to an optimum. You have to want this to make this work. Its powerful because it really is up to you. I like this analogy...Dr. Sievert will hand you the music...you just need to learn to play. LISTEN to his advice it will change your life!
Joyce Hays
I am so grateful for the excellent functional medicine work of Dr. Frank Sievert. He has a great deal of knowledge, and is committed to his thorough work with patients. After a year of working with him, I am feeling the best that i have for decades. No more body aches, no more brain fog. THANK YOU.
Lyn Radosevich
For five years I had been suffering with severe fatigue, pain, neuro and balance issues. I have meniscus tears in both knees, a back injury and a rotator cuff tear due to falls. I've been given multiple diagnoses: B12 deficiency, a rare form of MS, Parkinson's and Progressive Nuclear Palsy. Every day was a challenge. Medically there wasn't much hope for me improving. I've been seeing Dr Sievert for 6 months now. At my last appointment I laughed out loud as I drove up to the clinic and parked by the disabled parking spot. I have a permanent handicap parking permit but now, thanks to Dr Sievert, I park on the outer edge of parking lots so I get in as many steps as possible. We all want Insurance to pay for medical care and it's easy to bypass a doctor who does not accept insurance. However, when comparing the co-pays and deductibles I've paid over the last five years, Dr Sievert's memberships are actually less expensive. And I have my life back. How can you put a price on that?
Jean Runkle
Dr Sievert diagnosed my Hashimoto's Disease several years ago. At that time I experienced frequent migraines, bouts of IBS, sinus and bladder infections- as well as various other issues common for a 60+ female. Once diagnosed with Hashi's and going GF, Dr Sievert then recommended I have tests done for food allergies and sensitivities. We learned that many things in my diet were the cause of many of my issues, thus further dietary changes were made. It was not easy, but the results have been dramatic. I now weigh less than I did in my thirties, Over the last several years I've seen Dr Sievert twice yearly mainly to discuss lab work done and how to proceed in keeping Hashi's at bay and improve my general well-being in a proactive manner. Those previous problems are largely a thing of the past and that has been a Godsend. From the start it has been evident that Dr Sievert constantly strives to stay well ahead of the pack concerning getting to the core or the root of health issues by research and reading. He has become more than my doctor - he's become a friend and a teacher, as all doctors should be. The world of wellness would be a far greater place if we could clone Dr Sievert! I cannot say enough about all the ways his care, enthusiastic manner and genuine compassion have made my life better by encouraging me to be a partner with him in my health and well being.
Lisa Van Horn
I have been seeing Dr. Sievert for over ten years. He has been instrumental in helping me lose a huge amount of weight, identified that I had allergies, asthma, and other health issues. He has helped eliminate or reduce the symptoms of all these issues. When you first see him get ready! Your life is going to change drastically; no more gluten products, dairy, sugar, or junk foods; this includes prepared foods found in the grocery store and fast foods. Your eating habits will go from quick and easy to what is good for you. And I didn't mention exercise, this is also part of the get healthy regime. Dr. Sievert is always there to support you in changing your life by offering suggestions and materials for you to read to support what he is doing to help you get healthy. He will not fight with you; if you work with him, he will bust his backside to get you healthy. If you are unwilling to do as he suggests, he will refer you to another physician. Dr. Sievert has a good bedside manner; he will refresh your memory if you are not following the protocol, with all the things that can go wrong with your health if you are doing the program. His like an AA sponsor; tough love. Great doctor, if you are having serious health issues make an appointment; he will change your life from dying to living.
Ron Kerlee Med.
I attribute my good health and general well being in large part to Dr. Sievert, who has been my functional medicine doctor for 4 years. I recommend him to all my friends especially those with serious health issues and chronic conditions, who have seen conventional doctors and alternative healers without satisfactory results. He is a brilliant, compassionate physician, gifted at finding the root cause of health problems. The motivated patient ready to make lifestyle changes, will be greatly rewarded by working with Dr. Sievert.
Leslie Green
I found Dr. Sievert after living with autoimmune disease and chronic illness for decades. Traditional medicine was able to somewhat address my symptoms but never got to the root cause, and I began to suffer as much from the side effects of the medicines as from my illnesses. Dr. Sievert was able to work with me to identify foods I was eating that my body was reacting to, use alternative therapies that were less toxic to address my symptoms, and ultimately to rebuild and rebalance my immune system. It has literally transformed my life from chronically sick person to the person I used to be before I got so sick.
Debra Murray
Discovering Dr. Sievert and following his protocol has changed my life! I am so thankful to be able to work with him. After about ten years of seeking help for my thyroid issues to no avail, I was about ready to give up when a friend gave me a newspaper article about Dr. Sievert. He had personal experience dealing with the same thyroid issue as mine. I decided to give him a try despite the fact that his practice is about 4 hours from my home. I am so glad that I did and I can wholeheartedly exclaim that it is worth the effort to see him. Be diligent in following his suggestions and protocol and you will get amazing results, as I did. Becoming a patient of Dr. Sievert's could be one of the best decisions that you ever make. The health coach, Angie, is very insightful too, and the medical receptionist in the office is always very helpful. My health is priceless and I am so excited that I feel more like my normal self than I have for over a decade thanks to Dr. Sievert.
Karen Pleasant
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The Thrive Clinic, Functional Medicine in Corvallis, Oregon

The Thrive Clinic is a functional medicine clinic in Maryville, Tennessee committed to helping you achieve optimal health and vitality. We believe your health is your most valuable asset and your decisions should be treated accordingly. If you are tired of being sick and tired and ready to live fully, call The Thrive Clinic today.

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