Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Marguerite R Stewart, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1861474843

Marguerite R Stewart, MD practises Obstetrics/Gynecology in Tualatin, Oregon. Graduated from Wayne State University School of Medicine in 1985, 41 years ago. Practices with Womens Healthcare Associates LLC, a 104-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
41
Trained at
Wayne State University School of Medicine
Licensed in
OR
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

19250 SW 65th Ave Ste 300
Tualatin, OR 97062-7707
Phone: (503) 692-1242
Fax: (503) 691-3615
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence MD22723 (OR)

Record details

NPI number1861474843
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 16, 2005
Last updated in NPPESJanuary 30, 2026
Certification dateJanuary 30, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Womens Healthcare Associates Llc — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients27
Services billed 68 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Womens Healthcare Associates LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 104 clinicians in the practice; 12 are shown here.

Other providers in Tualatin