Skip to content
BestDosage

Best Functional Medicine Doctors in Portland, OR

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

Showing 19 of 19 functional medicine doctors

Last updated: May 2026

The highest-rated functional medicine doctors in Portland, OR include Stacy M. Ronquillo, FNP-BC, AGACNP-BC (BDS 8.9), Laura S. Martell, ND, LAc, FABNO, IFMCP, MSCP (BDS 8.6), Shalli B. Deyo, PharmD, IFMCP (BDS 8.5). Rankings are based on BestDosage's transparent BDS scoring methodology, which evaluates credentials, experience, and patient outcomes across 12 categories.

BestDosage has evaluated 19 functional medicine doctors in Portland, OR based on credentials, patient reviews, and practice transparency. The average BestDosage Score for functional medicine doctors here is 7.2 / 10 — reflecting a strong overall standard of care in this market. 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.

Functional Medicine Doctors in Nearby Cities

PractitionerExceptional8.9
Stacy M. Ronquillo, FNP-BC, AGACNP-BC — practitioner in Portland, OR

Stacy M. Ronquillo, FNP-BC, AGACNP-BC

Portland, OR
Functional Medicine
24 verified reviews
PractitionerExceptional8.6
Laura S. Martell, ND, LAc, FABNO, IFMCP, MSCP — practitioner in Portland, OR

Laura S. Martell, ND, LAc, FABNO, IFMCP, MSCP

Portland, OR
Published
Functional Medicine
14 verified reviews
PractitionerExceptional8.5
Shalli B. Deyo, PharmD, IFMCP — practitioner in Portland, OR

Shalli B. Deyo, PharmD, IFMCP

Portland, OR
Published
Functional Medicine
69 verified reviews
PractitionerExceptional8.5
Lisa Siino, DO, IFMCP — practitioner in Portland, OR

Lisa Siino, DO, IFMCP

Portland, OR
Functional Medicine
43 verified reviews
PractitionerExceptional8.2

Stephanie Jones, ARNP-C, IFMCP

Portland, OR
Published
Functional Medicine
2 verified reviews
PractitionerExceptional8.1
Aleksandra Giedwoyn, MD — practitioner in Portland, OR

Aleksandra Giedwoyn, MD

Portland, OR
PublishedClinical Trials
Functional Medicine
6 verified reviews
PractitionerExceptional8.1
Michelle Eckroth, MD — practitioner in Portland, OR

Michelle Eckroth, MD

Portland, OR
Functional Medicine
34 verified reviews
PractitionerExceptional8.0
Ericha Clare, ND, LAc, IFMCP — practitioner in Portland, OR

Ericha Clare, ND, LAc, IFMCP

Portland, OR
Published
Functional Medicine
162 verified reviews
Practitioner
Jillian Moehle, ND, IFMCP, MSCP — practitioner in Portland, OR

Jillian Moehle, ND, IFMCP, MSCP

Portland, OR
Functional Medicine
2 verified reviews
Practitioner
Virginia Shapiro, DC — practitioner in Portland, OR

Virginia Shapiro, DC

Portland, OR
Functional Medicine
5 verified reviews
Practitioner

Krista Espenship, IFMCP

Portland, OR
Functional Medicine
6 verified reviews
Practitioner
Maggie K. Yu, MD — practitioner in Portland, OR

Maggie K. Yu, MD

Portland, OR
Published
Functional Medicine
129 verified reviews
Practitioner
Jill Carter, DNP, FNP, PMHNP — practitioner in Portland, OR

Jill Carter, DNP, FNP, PMHNP

Portland, OR
Published
Functional Medicine
2 verified reviews
Practitioner
Frank A. Sievert, MD — practitioner in Portland, OR

Frank A. Sievert, MD

Portland, OR
Published
Functional Medicine
182 verified reviews
Practitioner
Kaley Bourgeois, ND — practitioner in Portland, OR

Kaley Bourgeois, ND

Portland, OR
NPI Verified
Functional Medicine
49 verified reviews
Practitioner
Staci  Whitman, DMD, IFMCP — practitioner in Portland, OR

Staci Whitman, DMD, IFMCP

Portland, OR
Published
Functional Medicine
278 verified reviews
Practitioner
Ann Marie Dundas — practitioner in Portland, OR

Ann Marie Dundas

Portland, OR
Functional Medicine
3 verified reviews
Practitioner

Lara Williams

Portland, OR
Functional Medicine
45 verified reviews
Practitioner
Kelly Witbeck — practitioner in Portland, OR

Kelly Witbeck

Portland, OR
Functional Medicine

Frequently Asked Questions

Who is the best functional medicine doctor in Portland, OR?
The highest-rated functional medicine doctors in Portland, OR based on BestDosage Scores include Stacy M. Ronquillo, FNP-BC, AGACNP-BC (BDS 8.9), Laura S. Martell, ND, LAc, FABNO, IFMCP, MSCP (BDS 8.6), Shalli B. Deyo, PharmD, IFMCP (BDS 8.5). Rankings are updated regularly using credentials, patient reviews, and practice transparency data.
How are functional medicine doctors in Portland, OR 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 Portland, OR?
We currently have 19 functional medicine doctors listed in Portland, OR, each scored and ranked using our AI-powered methodology.
How much does a functional medicine doctor cost in Portland, OR?
Functional medicine doctor costs in Portland, OR 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 Portland, OR?
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.
CW

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