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, algorithmically scored, 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 Kelly K. McCann, MD, MPH&TM, IFMCP, ABoIM (BDS 9.9), Hillary Bassett, MD, IFMCP (BDS 9.7), Darcy Oikawa, DC, IFMCP (BDS 9.5). Rankings are based on BestDosage's transparent BDS scoring methodology, which evaluates reviewed reputation, listed credentials, professional presence, profile depth, and location detail — five weighted criteria drawn from public data.

BestDosage has evaluated 117 functional medicine doctors across California based on credentials, patient reviews, and practice transparency. The average BestDosage Score across California is 8.2 / 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 Kelly K. McCann, MD, MPH&TM, IFMCP, ABoIM (BDS 9.9), Hillary Bassett, MD, IFMCP (BDS 9.7), Darcy Oikawa, DC, IFMCP (BDS 9.5). 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 five weighted criteria drawn from public data: reviewed reputation, listed credentials, professional presence, profile depth, and location detail. Scores run to 10, and we publish one only at 7.0 or above.

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

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

Hillary Bassett, MD, IFMCP

Darcy Oikawa, DC, IFMCP

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

Carolyn Finnegan, DC, IFMCP

Richard Chen, MD

Elizabeth Greenfield, MS, APRN, IFMCP

David Wiss, PhD, RDN, IFMCP

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

Ionela Hubbard, OMD, LAc, IFMCP

Judy Liu, MD

Laura Wakil, MD, IFMCP

Myrto A. Ashe, MD, MPH, IFMCP

Laura Paris, DACM, LAc

Tiffany Caplan, DC, DNM, IFMCP

Ana Virginia Jofili, MD

Aaron Erez, DO

Edmund H. Lew, MD

Danielle J. Douglas, MD

Smitha C. Reddy, MD, Functional Medicine, Rheumatologist

Basima Williams, DO

Natalya Denissov, MD

Jiyeon Park, DACM, LAc, IFMCP

Kimberly Kelly, ND

Jordan Scott, ND

Jeffrey Mark, MD

Helene Pulnik, ND

Elroy Vojdani, MD

Arno Kroner, DAOM LAc Dipl.OM FMCP

Alexandra Chaux, DPT, PT

Sonya Kim, MD, MBA

Kim Shine, MD

Robert Drew Francis , OMD, L.Ac

Lissa Solis, DACM, LAc

Rekha Murali, MD, IFMCP, Health Coach

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

Franne Berez, MD

Antonella Aguilera-Ruiz, ND

Jennifer Tang, MD, AFMCP, Acupuncture

George Rice, MD, MS

Cambria Judd, MD

Susan Cislo, DO

Maria Santee, PA-C, MPH, A4M Functional Fertility

Janette M. Trapp, MSN, FNP-C

Daniel Metzger, DACM, L.Ac., IFMCP

Laura M. Abrignani, RN, NP, MSN

Bill Barley, MD

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

Anita Kriplani, MD

Anjali Chanana, MD

Daniel E. Rieders, MD

Margaret M. Gold, MD, PC, MMTCP, Certification CIIS CPTR

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

Gaila Mackenzie-Strawn, MS, DC, CTN, DNM, CFMP

Kaisa Coppola, D.C.

Lisa Loegering, MD

Sandeep Kapoor, MD

Brent A. Caplan, DC, DNM, IFMCP

Sally Daganzo, MD, MA, FACP, CEDS

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

Frequently Asked Questions

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