Best Functional Medicine Doctors in California

Functional medicine practitioners who address root causes of disease through systems-oriented, patient-centered care. Browse and compare functional medicine doctors across California, scored by AI, powered by real data.

Showing 60 of 117 functional medicine doctors in California

Last updated: May 2026

The highest-rated functional medicine doctors in California include Christina Marino, L.AC, DAOM, DIPL.OM, DIPL.Ac. MS, IFMCP (BDS 9.1), Tiffany Caplan, DC, DNM, IFMCP (BDS 8.9), Elizabeth Greenfield, MS, APRN, IFMCP (BDS 8.9). Rankings are based on BestDosage's transparent BDS scoring methodology, which evaluates credentials, experience, and patient outcomes across 12 categories.

BestDosage has evaluated 117 functional medicine doctors across California based on credentials, patient reviews, and practice transparency. The average BestDosage Score across California is 8.3 / 10 — reflecting a strong overall standard of care statewide. Functional medicine doctors are typically MDs, DOs, NDs, or NPs with additional training through the Institute for Functional Medicine (IFM). Look for board certification and documented experience with root-cause, systems-based protocols.

Frequently Asked Questions

Who is the best functional medicine doctor in California?

The highest-rated functional medicine doctors in California based on BestDosage Scores include Christina Marino, L.AC, DAOM, DIPL.OM, DIPL.Ac. MS, IFMCP (BDS 9.1), Tiffany Caplan, DC, DNM, IFMCP (BDS 8.9), Elizabeth Greenfield, MS, APRN, IFMCP (BDS 8.9). Rankings are updated regularly using credentials, patient reviews, and practice transparency data.

How are functional medicine doctors in California scored?

Each functional medicine doctor is scored across 12 categories using public reviews and verified credentials. Scores range from 1 to 10, with tiers from "Listed" to "Elite."

How many functional medicine doctors are listed in California?

We currently have 117 functional medicine doctors listed in California. Browse by city to find providers near you.

How much does a functional medicine doctor cost in California?

Functional medicine doctor costs in California vary by provider, treatment type, and whether insurance is accepted. Many practitioners offer free consultations. Use BestDosage to compare pricing transparency across providers.

What should I look for in a functional medicine doctor?

Look for verified credentials, high patient review scores, transparent pricing, and relevant specializations. BestDosage evaluates all of these factors in its BDS scoring methodology so you can compare providers at a glance.

Which cities in California have the most functional medicine doctors?

The top cities for functional medicine doctors in California include Los Angeles (57), San Francisco (42), San Diego (10), Sacramento (4), Fresno (3).

Does insurance cover functional medicine doctor visits in California?

Insurance coverage for functional medicine doctor visits varies by plan and state. Some providers accept insurance directly, while others offer superbills for out-of-network reimbursement. Check individual practitioner profiles on BestDosage for insurance details.

Is it free to find a functional medicine doctor on BestDosage?

Yes, browsing the directory, viewing profiles, and comparing providers is completely free. Our scoring methodology is published openly for full transparency.

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Reviewed by Chad Waldman, Analytical Chemist · BestDosage Editorial Team · Last updated May 2026

Best Functional Medicine Doctors in California

Functional Medicine Doctors by City in California

Other Wellness Providers in California

Christina Marino, L.AC, DAOM, DIPL.OM, DIPL.Ac. MS, IFMCP

Tiffany Caplan, DC, DNM, IFMCP

Elizabeth Greenfield, MS, APRN, IFMCP

Hillary Bassett, MD, IFMCP

Helene Pulnik, ND

Laura Wakil, MD, IFMCP

Laura Paris, DACM, LAc

Victoria A. Rivera, MS, PA-C

Kelly K. McCann, MD, MPH&TM, IFMCP, ABoIM

Sally Daganzo, MD, MA, FACP, CEDS

Yen Ingrid Lai, MD, ABFM, ABOIM, IFMCP

Shilpa Sayana, MD, MPH, IFMCP

Theresa Tsingis, PA-C, DC, MPH, MS, IFMCP

Smitha C. Reddy, MD, Functional Medicine, Rheumatologist

Myrto A. Ashe, MD, MPH, IFMCP

Jan Kielmann, DCN, MS, CNS, IFMCP, RHGt, CPTR

Sandra Fleming, MD, IFMCP

Darcy Oikawa, DC, IFMCP

David Wiss, PhD, RDN, IFMCP

Kristine Burke, MD, ABFM, ABoIM, FMCP-M

Phuong Nguyen, DNP, NP-C, IFMCP

Daniel Metzger, DACM, L.Ac., IFMCP

Brent A. Caplan, DC, DNM, IFMCP

Carolyn Finnegan, DC, IFMCP

Richard Chen, MD

Aaron Erez, DO

Elroy Vojdani, MD

Leigh Erin Connealy, MD

Basima Williams, DO

Danielle J. Douglas, MD

Edmund H. Lew, MD

Jennie Walker, MD

Rekha Murali, MD, IFMCP, Health Coach

Lexy Parsons, DACM, MS, L.Ac

George Rice, MD, MS

Anita Kriplani, MD

Arno Kroner, DAOM LAc Dipl.OM FMCP

Sandeep Kapoor, MD

Emily Jiang, MD

Cambria Judd, MD

Wendy Rashidi, MD

Judy Liu, MD

Dr. Ryan Lazarus, MSc, CNS, IFMCP, DC

Ana Virginia Jofili, MD

Nicole L. Lyons, ND

Tracy H. McCarthy, MD

John Beech, DC, IFMCP, CFMP

Jiyeon Park, DACM, LAc, IFMCP

Sylvie Wellhausen, DC

Michael Villadelgado, MD

Angelica Salazar, MD

Julia Moen, Dr

Michelle S. Pourtabib, MD

Robert Drew Francis , OMD, L.Ac

Michelle Ross, MS, MA, CNS, LDN, IFMCP

Franne Berez, MD

Lisa Loegering, MD

Shiroko Sokitch, MD

Manna Semby, ND,MSCP, IFMCP

Lusine Simonyan, NMD

Frequently Asked Questions

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