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Root Cause

Best Practitioners in Los Angeles, CA

28 practitioners · 0 specialties · Updated Jul 2026

Top Practitioners in Los Angeles

Premier IFM is an integrative functional medicine center founded by Dr. Craig Mortensen, an IFM-certified practitioner (IFMCP) with over 12 years of exclusive functional medicine practice and more than 5,000 clients served worldwide. The clinic takes a root-cause approach to chronic disease, combining advanced lab testing, detailed health histories, and systems-based analysis to create personalized treatment protocols. The practice specializes in complex chronic conditions including autoimmune diseases, thyroid dysfunction, chronic fatigue, digestive disorders, hormonal imbalances, CIRS, Lyme disease, and metabolic issues. Beyond consultations, Premier IFM offers in-office therapies such as hyperbaric oxygen therapy (HBOT), infrared sauna, cold laser therapy, and halo salt and red light therapy at their Placentia, CA location. Dr. Mortensen holds certifications from the Institute for Functional Medicine, Functional Medicine University, and has trained under Dr. Datis Kharrazian. The team includes Nurse Jessica Cardona and Kristen Mortensen. The practice does not bill insurance directly but provides superbills for out-of-network reimbursement, and offers wholesale lab pricing for uninsured patients. With a 4.8-star rating across review platforms, patients consistently highlight the thoroughness of the evaluation process, the evidence-based approach, and successful outcomes for conditions that conventional medicine failed to resolve. The clinic serves both in-person and telemedicine patients nationally and internationally.

hol+ offers functional and holistic medicine to enhance your health journey, combining functional medicine, nutrition counseling, stress management, and lifestyle coaching.

Dr. Rachel West is an integrative medicine physician in Los Angeles who consistently follows innovative and proven ideas in contemporary medicine.

Dr. Shiva Lalezar creates personalized treatment plans, identifying and resolving the root causes of illness using a comprehensive Functional Medicine approach.

Dr. Anshul Gupta is a board certified Family Medicine Physician with advanced certification in Functional Medicine.

Dr. Pouya Shafipour is an Integrative Medicine Specialist in Santa Monica, CA, focusing on whole-person health through health education, guidance, and preventive care.

Offers a full suite of integrative medicine programs and services with renowned experts, focusing on whole-person health.

Dr. Allen Green, MD, is a board-certified family physician with over 30 years of experience specializing in Integrative, Functional, and Wellness Medicine. As the founder of the Center for Optimum Health in Los Angeles, he combines conventional medical practices with natural, nutritional, and herbal therapies to provide personalized, holistic care. Dr. Green's approach focuses on treating the root causes of health issues, offering services like Hormone Balancing, Peptide Therapy, and Chronic Infection Management, tailored to meet the unique needs of each patient. He is known for his dedication to personalized care and innovative treatments. Dr. Green's philosophy centers on empowering patients to achieve lasting health through preventive care and personalized treatment plans. He integrates conventional medicine with nutritional, herbal, and detoxification therapies, emphasizing a comprehensive, individualized approach to health and well-being. His expertise spans a wide range of treatments, from IV Therapy and Detoxification to managing complex conditions like Mycotoxin Illness, Cardiovascular Disease, and Chronic Fatigue. The Center for Optimum Health offers unique and cutting-edge testing options that search for the hidden causes of many health problems, tests not typically offered by most physicians. These tests include thorough hormone evaluations, tests for nutritional imbalances, genetic testing, evaluations of toxicity and allergy testing. Treatments are tailored to each individual's needs with a focus on looking for and eliminating the root causes of disease, and not just treating symptoms. Patients at the Center for Optimum Health can expect a holistic approach to healthcare that includes a thorough history, physical, and medical testing. Comprehensive treatment programs may include nutrient supplementation, herbal medicine, dietary counseling, exercise prescription, homeopathy, pharmaceutical, bio-identical hormone replacement, intravenous therapies, and energy medicine modalities. The goal is to assist people in optimizing their overall health and treating illness as safely, naturally, and as non-toxically as possible.

Dr. Jeremy Fischer, Naturopathic Doctor, has trained in the US and China, and synthesizes the tools of modern diagnostic information and treatments.

Dr. Rachel West is a board certified Integrative Family Medicine Physician and Osteopath in Los Angeles.

Dr. Farshid Sam Rahbar incorporates anti-aging & functional medicine for an integrative holistic approach to digestive care.

Dr. Shiva Lalezar at the Health and Vitality Center uses a Functional Medicine approach to identify and resolve the root causes of illness, creating personalized treatment plans.

Dr. Farshid Sam Rahbar is a leading integrative gastroenterologist in Los Angeles, incorporating anti-aging & functional medicine for a holistic approach to digestive care.

Michael Farzam, M.D. and his team at House Call Doctors are now offering functional medicine for interested patients.

Dr. Anju Mathur MD is a functional medicine doctor in Los Angeles, CA, who practices holistic healthcare & focuses on the root cause of health issues.

Doctor Guy combines innovative integrative modalities with functional, naturopathic, and conventional medicine, specializing in treating chronic disease, hormone imbalance, joint pain, gut health, anti-aging, and regenerative medicine.

Vitality Integrative Medicine, led by Dr. Jeremy Fischer ND LAc, offers comprehensive holistic medicine treatments and personalized treatment plans for chronic diseases and wellness care.

The Center for Optimum Health, with locations in East Lansing and Grand Rapids, Michigan, and Los Angeles, California, offers integrative and functional medicine, combining conventional medical practices with natural, nutritional, and herbal therapies to provide personalized, holistic care. They specialize in identifying and addressing the root causes of health issues, focusing on hormone balancing, peptide therapy, and chronic infection management. The practice emphasizes a whole-person approach, considering physical, hormonal, mental, emotional, sexual, and spiritual aspects, and aims to empower individuals to make lifestyle changes for optimal health and endocrine balance. In Los Angeles, Dr. Allen Green leads the Center for Optimum Health, bringing over 30 years of experience in integrative, functional, and wellness medicine. He provides comprehensive care tailored to individual needs, with expertise in hormone replacement therapy, weight loss solutions, and treatments for conditions like cardiovascular disease and chronic fatigue. The Los Angeles location offers services such as IV therapy, detoxification, and cutting-edge therapies aimed at achieving long-term wellness. The Michigan location focuses on diabetes and cardiovascular disease prevention, weight management, menopause/hormone replacement therapy, and endocrine disorders. They utilize both conventional and alternative medicine to promote holistic health, offering customized programs to improve wellness. The Center aims to provide patients with the tools and counseling needed to embrace a healthier lifestyle. Patients consistently praise the Center for Optimum Health for its holistic approach, the thoroughness of its practitioners, and the effectiveness of its treatments. Reviews highlight Dr. Green's attentiveness and ability to address hormone issues, as well as the supportive and caring nature of the staff. The practice is known for empowering patients to actively participate in their health journey, making it a suitable choice for those seeking a comprehensive and personalized approach to healthcare.

Angel Longevity Medical Center, led by Dr. Anju Mathur, specializes in root-cause healing, focusing on the underlying factors behind chronic illness with personalized, evidence-based, holistic care.

IHS Medical Group offers functional medicine in Los Angeles, creating personalized plans based on functional lab tests to optimize body chemistry and address underlying health issues.

Dr. Shiva Lalezar creates personalized treatment plans with over 20 years of experience in Functional, Integrative, Holistic, Anti-Aging, and Environmental Medicine.

Melissa Quinn, MD, identifies factors contributing to anxiety, depression, and other mental health issues, offering treatments and resources for long-term wellness.

Dr. Jeremy Fischer ND LAc can help you achieve the best results with a personalized treatment plan for chronic diseases and wellness care at Vitality Integrative Medicine.

Dr. Rachel West is a board certified Integrative Family Medicine Physician and Osteopath in Los Angeles who utilizes innovative therapies, including Heavy Metal Detoxification, Hormone Replacement, Anti-Aging Medicine, and Nutritional Therapies.

Dr. Anju Mathur MD is a functional medicine doctor in Los Angeles, CA, who practices holistic healthcare & focuses on the root cause of health issues.

Dr. Ryan Monahan combines Functional Medicine & Eastern Medicine to identify the root cause of internal imbalance.

Dr. Allen Green, M.D. is a board-certified family physician with 36+ years of experience specializing in integrative, functional, and wellness medicine. Founder of Center for Optimum Health in Los Angeles, combining conventional medicine with natural, nutritional, and herbal therapies.

Guy Citrin, ND, dedicates his time and expertise to helping men and women improve their general health and quality of life at his private practice, Doctor Guy, in Mid-Wilshire, Los Angeles.

About Practitioners in Los Angeles

Los Angeles, CA is home to 60 beauty and wellness spas in our directory. Popular treatments in the area include chemical peels, HydraFacials, dermaplaning, LED light therapy, microneedling. Browse our directory to compare ratings, prices, and services to find the perfect spa for you.

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Frequently Asked Questions

How many practitioners are in Los Angeles?

We currently list 28 functional medicine practitioners in Los Angeles, CA.

What specialties are popular in Los Angeles?

Browse our specialties page to see the most popular service types available in Los Angeles.