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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DUNCAN REESE NEILSON JR. MD
NPI 1386607414
Obstetrics & Gynecology in Portland, OR

Active since April 10, 2006
300 N GRAHAM ST, STE 100 MEDICAL PLAZA BLDG LEGACY EMANUEL HOSPITAL, PORTLAND, OR 97227(503) 413-3622(503) 413-4238 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Duncan Reese Neilson Jr. Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DUNCAN REESE NEILSON JR. MD (NPI 1386607414) is an individual obstetrics & gynecology provider in Portland, Oregon, licensed in Oregon (MD08860) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1386607414
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDUNCAN REESE NEILSON JR.Credential: MD
Location Address300 N GRAHAM ST, STE 100 MEDICAL PLAZA BLDG LEGACY EMANUEL HOSPITALPortland, OR 97227-1683
Mailing Address300 N Graham St, Ste 100 Medical Plaza Bldg Legacy Emanuel HospitalPortland, OR 97227 · (503) 413-3622 · Fax (503) 413-4238
Phone(503) 413-3622
Fax(503) 413-4238
Sole ProprietorNo
Enumeration DateApril 10, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1386607414 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in OR · MD08860✔ Licensed in WA · MD00045703
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
300 N GRAHAM ST, Portland, OR 97227
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Other Identifiers 1

Medicaid136762OR

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHRYN D MOYER M.D.
Pediatrics (Pediatric Gastroenterology)
300 N GRAHAM ST, SUITE 420
PORTLAND, OR 97227
Multnomah County (503) 281-5139
PEDIATRIC CARDIOLOGY CENTER OF OREGON PC
Pediatrics (Pediatric Cardiology)
300 N GRAHAM ST, SUITE 250
PORTLAND, OR 97227
Multnomah County (503) 280-3418
MATTHEW RYAN RILEY MD
Pediatrics (Pediatric Gastroenterology)
300 N GRAHAM ST, SUITE 420
PORTLAND, OR 97227
Multnomah County (503) 281-5139
DR. JENNIFER CAROL PRUNTY O.D.
Optometrist
300 N GRAHAM ST, SUITE 300
PORTLAND, OR 97227
Multnomah County (503) 413-3030
DR. MICHAEL HELMY TEWFIK M.D.
Internal Medicine
300 N GRAHAM ST, SUITE 200
PORTLAND, OR 97227
Multnomah County (503) 413-4134
DR. LORI J. FARRELL M.D.
Internal Medicine
300 N GRAHAM ST, SUITE 200
PORTLAND, OR 97227
Multnomah County (503) 413-4134
WILLIAM FRANCIS MARSHALL JR. MD
Pediatrics (Pediatric Gastroenterology)
300 N GRAHAM ST, SUITE 420
PORTLAND, OR 97227
Multnomah County (503) 281-5139
DR. WALTER JOE WEICK M.D.
Obstetrics & Gynecology (Maternal & Fetal Medicine)
300 N GRAHAM ST, SUITE #100
PORTLAND, OR 97227
Multnomah County (503) 413-1122

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Duncan Neilson's NPI number?

The NPI number for Duncan Neilson is 1386607414. It was assigned to this individual provider in the NPPES registry on April 10, 2006.

Where is Duncan Neilson located?

Duncan Neilson practices at 300 N Graham St Ste 100 Medical Plaza Bldg Legacy Emanuel Hospital, Portland, OR 97227. The listed phone number is (503) 413-3622.

What is Duncan Neilson's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

When was this NPI record last updated?

The NPPES record for Duncan Neilson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.