Best Functional Medicine Doctors in Chicago, IL

Functional medicine practitioners who address root causes of disease through systems-oriented, patient-centered care. Compare top-rated functional medicine doctors in Chicago, IL, algorithmically scored, powered by real data.

Showing 28 of 29 functional medicine doctors

Last updated: May 2026

The highest-rated functional medicine doctors in Chicago, IL include Sarah J. Zielsdorf, MD, MS (BDS 9.5), Jessica Hehmeyer, DC, MS, LDC, CNS, IFMCP (BDS 8.8), Peter Kozlowski, MD, IFMCP (BDS 8.8). 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 29 functional medicine doctors in Chicago, IL based on credentials, patient reviews, and practice transparency. The average BestDosage Score for functional medicine doctors here is 6.8 / 10 — indicating a mix of established and emerging practices. 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.

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Frequently Asked Questions

Who is the best functional medicine doctor in Chicago, IL?

The highest-rated functional medicine doctors in Chicago, IL based on BestDosage Scores include Sarah J. Zielsdorf, MD, MS (BDS 9.5), Jessica Hehmeyer, DC, MS, LDC, CNS, IFMCP (BDS 8.8), Peter Kozlowski, MD, IFMCP (BDS 8.8). Rankings are updated regularly using credentials, patient reviews, and practice transparency data.

How are functional medicine doctors in Chicago, IL 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 Chicago, IL?

We currently have 29 functional medicine doctors listed in Chicago, IL, each scored and ranked using our AI-powered methodology.

How much does a functional medicine doctor cost in Chicago, IL?

Functional medicine doctor costs in Chicago, IL 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.

How do I choose the best functional medicine doctor in Chicago, IL?

Review BestDosage Scores and patient reviews, then consider telehealth availability, insurance acceptance, and specialization. Use our comparison tool to evaluate providers side by side, or take the Wellness Match quiz.

Does insurance cover functional medicine doctor visits?

Insurance coverage for functional medicine doctor visits varies by plan and provider. Some 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 Chicago, IL

Sarah J. Zielsdorf, MD, MS

Jessica Hehmeyer, DC, MS, LDC, CNS, IFMCP

Peter Kozlowski, MD, IFMCP

Terese Black, ND, DC, IFMCP

Alison Lechner, DO

Tristah Romero Kelly, NP

Crystal J. Dillett, APNP

Sandra A. Lambatos, DC

Frances Baxley, MD

Victoria Nee, MD

Maureen M. Milota, APRN, MSN, IFMCP

Tamara Nosa, Family Nurse Practitioner, APRN-FPA

Hetal Shah, MD

Janusz Mejer

Kelsey Heckaman, FNP-C

Lauren M. Towle, MD

Rajka Milanovic Galbraith, MD

Joanna Kleszcz, MSN, APRN, ANP-C

Sandra Wright

Debra R. Brunk, DNP, FNP-BC

Rachael Fabbi, DC, DABCI, IFMCP

Casey Kelley, MD

Judy Marshall, MS

Cara VanWormer-Hartman, DC

Kori Feldman, MD

Brittany M. Parisot-Sebby, DC, DABCI, DACBN, IFMCP

Inna Hoffman, APNP

Cynthia L. Jakubiec, DC

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