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Your Trusted Functional Medicine Practice in Irvine
At The Functional Medicine Center, we specialize in identifying and addressing the root causes of chronic health conditions through a comprehensive, patient-centered approach. Founded by Dr. Steve Hyjek, our practice integrates Functional Medicine with advanced diagnostic testing and personalized treatment protocols to restore optimal health. With expertise in autoimmune conditions, thyroid disorders, and metabolic imbalances, we prioritize natural, holistic solutions tailored to each individual's unique needs.

Our team combines cutting-edge science with compassionate care to deliver sustainable results, empowering patients to achieve long-term wellness. Backed by years of clinical experience and ongoing professional development, we are committed to transforming lives by addressing the underlying factors contributing to illness. Our approach emphasizes collaboration, education, and accountability, ensuring patients receive the support necessary to reclaim their health and vitality.
Services
Functional Medicine Chiropractic Care Lab Testing Clinical Nutrition Low-Level Laser Therapy
Highlights and features
  • We offer personalized Functional Medicine protocols based on advanced diagnostic testing
  • Our team combines Chiropractic care with evidence-based natural therapies
  • Specialized expertise in autoimmune conditions and thyroid disorders
  • Comprehensive approach addressing genetic, environmental, and lifestyle factors
  • Proven track record helping patients achieve remission from chronic conditions
What people say
Treats the cause, not the symptoms Feeling better than ever Chronic pain relief Personalized treatment approach Restored energy and clarity
Services
Functional Medicine
Our Functional Medicine approach identifies and corrects underlying health imbalances through comprehensive testing and personalized treatment plans. We address chronic conditions like autoimmune diseases and hormonal imbalances by integrating genetic, environmental, and lifestyle factors. This systems-oriented methodology focuses on restoring optimal physiological function through natural interventions tailored to each patient's unique needs.
Chiropractic Care
We provide traditional and low-force Chiropractic adjustments to improve spinal alignment and nervous system function. Our approach addresses musculoskeletal pain, posture issues, and related health concerns through manual therapies and complementary techniques. Treatment plans incorporate corrective exercises and lifestyle recommendations to support long-term musculoskeletal wellness and overall health optimization.
Lab Testing
Advanced diagnostic testing helps identify hidden health issues through comprehensive analysis of hormonal, metabolic, and immune system function. We utilize specialized labs to detect food sensitivities, gut health imbalances, and environmental toxin exposure. These insights guide targeted interventions that address the biochemical root causes of chronic health conditions.
Clinical Nutrition
Personalized nutrition plans address dietary triggers and nutrient deficiencies contributing to chronic illness. We develop customized eating strategies based on individual biochemistry, food sensitivities, and health goals. Our evidence-based approach incorporates therapeutic supplementation and whole-food diets to support cellular health and metabolic balance.
Low-Level Laser Therapy
This non-invasive treatment uses specific light wavelengths to stimulate cellular repair and reduce inflammation. We employ Erchonia lasers to address chronic pain, accelerate tissue healing, and improve circulation without side effects. The therapy complements other treatments to enhance recovery from musculoskeletal injuries and neurological conditions.
People
Dr. Steve Hyjek
Founder/Doctor
Dr. Steve Hyjek combines Functional Medicine with Chiropractic expertise to treat chronic health conditions. Board-certified in Chiropractic and Functional Medicine, he specializes in autoimmune disorders and metabolic imbalances. His practice integrates advanced diagnostics with personalized treatment protocols to address root causes of illness.
Questions
What chronic conditions do you treat?
We specialize in autoimmune diseases, thyroid disorders, hormonal imbalances, digestive issues, and metabolic conditions like diabetes through personalized Functional Medicine approaches.
How is your approach different from conventional medicine?
We focus on identifying and correcting root causes rather than managing symptoms, using advanced diagnostics and natural interventions tailored to each patient's unique physiology.
Do you accept insurance?
We operate as an out-of-network provider to maintain treatment flexibility, but provide documentation for potential insurance reimbursement through PPO plans.
What diagnostic methods do you use?
We employ comprehensive lab testing, functional assessments, and advanced diagnostics to identify hidden health imbalances and create targeted treatment plans.
Are your treatments covered by health savings accounts?
Many of our services qualify as eligible medical expenses for HSA reimbursement, including consultations, lab tests, and recommended supplements.
How long does treatment typically take?
Treatment duration varies by condition complexity, but most patients see significant improvements within 3-6 months through our structured, phased approach to care.
Reviews (4)
Nikki R.
Apr 18, 2021 Report
I had been struggling for a couple of years with horrible headaches and just overall not feeling well. Then I started getting deep muscle aches that felt like they were going to my bones. I kept gaining weight no matter how hard I worked out or what diet I tried. I felt miserable! I went to numerous doctors and they all told me I was fine. One even told me I simply needed portion control. I purchased a book about how to heal my thyroid naturally and the author mentioned functional medicine. Magically Dr. Steve was close to me.

I made an appointment and was instantly impressed with his knowledge and the fact he actually listened to me and did not dismiss anything I said. After multiple tests Dr. Steve figured out the problem and got me started on a diet and supplements to start the healing process. I will admit sticking to it was not always the easiest, but I am sure glad I did. I have never felt better! I am able to workout again and see progress. I no longer feel the need to nap during the day and rarely have a headache. Please go see Dr. Steve today!
Alexandra Sophia Marsalis
Feb 19, 2021 Report
I have no doubt that Dr. H. is a brilliant chiropractor and super knowledgable Functional Medicine Practitioner. When I first came, he did some serious blood testing, muscle testing and gave me a prescription for a variety of supplements. However, he is not an MD and is not allowed to prescribe Medicine. Had I needed that, I still would need to pay for an additional consult with an MD specialized in Functional Medicine to get any prescription medicine.

When the business name says "Functional Medicine Center", I find it very important to inform your patients what your limitations are, so that they are well informed prior to committing to paying for a consult. Seems just a matter of practical honesty to me. And therefore, I would rather prefer to consult with an MD specialized in Functional Medicine, as to avoid additional costs next time.
S. Matsuura
Jan 24, 2021 Report
I was searching for a chiropractor for a while after moving from NorCal to SoCal. Finally found a one similar to the chiropractor I was seeing in NorCal. Dr. Hyjek definitely knows his stuff and strong enough to execute. Started me off with adjustments and routines to get my spin back in shape. After a month and a half of regular visits I definitely feel more balanced and more flexible.
Parvin Soroushian
Dec 30, 2018 Report
I was very enthusiastically referred to Dr. Hyjek by a friend who was a former patient of his. I started seeing him in Oct. 2017 to treat several chronic health issues. He is extremely thorough & goes out of his way to explain how treating such issues is like peeling the layers of an onion. Well it's taken a lot of work and a lot of patience but he has been there every step of the way to explain & to encourage. I can honestly say I could not be happier with the results. Functional medicine is definitely the way to go & he represents the best of them. Thank you Dr. Steve (& Jen)!