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

Thomas D. Brennan, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1831539634

Thomas D. Brennan, MD is an Obstetrics/Gynecology in Portland, Oregon. Graduated from Oregon Health Sciences University School of Medicine in 2015, 11 years ago. Practices with Womens Healthcare Associates LLC, a 104-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
11
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
OR
In the registry since
2013
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

9701 SW Barnes Rd Ste 200
Portland, OR 97225-6689
Phone: (503) 734-3700
Fax: (503) 473-8462
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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 MD191851 (OR)

Record details

NPI number1831539634
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 26, 2013
Last updated in NPPESJanuary 28, 2026
Certification dateJanuary 28, 2026
Mailing address7650 Sw Beveland Rd Ste 200, Portland, OR 97223-8692

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Womens Healthcare Associates Llc — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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