Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Alyssa Marie O'Brien, RD

Individual provider Registered Dietitian · NPI 1023483799

Alyssa Marie O'Brien, RD is a Registered Dietitian OR Nutrition Professional in Portland, Oregon. Qualified in 2008, 18 years ago. Practices with Gi Nutrition NW, LLC, a 2-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
18
Licensed in
OR
In the registry since
2015
Specialties on file
2
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Address checks out

1111 NE 99th Ave
Portland, OR 97220-9428
Phone: (503) 963-2707
Fax: (503) 963-2802
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 1508 Division St Ste 15, Oregon City, OR 97045-1583 — (503) 692-3750
  • 9701 Sw Barnes Rd Ste 300, Portland, OR 97225-6689 — (503) 297-8081
  • 19250 Sw 90th Ave, Tualatin, OR 97062-7585 — (503) 692-3750

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence LD-D-10184454 (OR)
Registered Dietitian Taxonomy 133V00000X · Licence 984417

Record details

NPI number1023483799
Entity typeIndividual (Type 1)
GenderFemale
Credentials RD
Sole proprietorNo
NPI enumeratedDecember 7, 2015
Last updated in NPPESJuly 21, 2022

Medicare enrollment

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

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Gi Nutrition Nw, Llc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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