What is Alyssa O'Brien's NPI number?

Alyssa O'Brien's National Provider Identifier (NPI) is 1023483799, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Alyssa O'Brien's specialty?

Alyssa O'Brien is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).

Where is Alyssa O'Brien located?

Alyssa O'Brien's practice location on file with NPPES is 1111 Ne 99th Ave, Portland, OR 97220-9428.

What is Alyssa O'Brien's phone number?

The practice phone number listed in the NPPES registry for Alyssa O'Brien is (503) 963-2707.

Does Alyssa O'Brien accept Medicare?

Alyssa O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Alyssa O'Brien's NPI active?

Yes — Alyssa O'Brien's NPI (1023483799) is active in the NPPES registry as of the last update on 2022-07-21.

IndividualActiveAccepts Medicare

Alyssa O'Brien, RD

NPI 1023483799 · Registered Dietitian · Portland, OR

Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Alyssa O'Brien, RD is a Registered Dietitian provider in Portland, OR (NPI 1023483799).

Provider details

NPI number: 1023483799
Entity type: Individual
Primary specialty: Registered DietitianDietary & Nutritional Service Providers
Credential: RD
Sex: Female
Sole proprietor: No
License: 984417

Specialties & taxonomies

Registered DietitianPrimary133V00000XLicense LD-D-10184454 (OR)
Dietary & Nutritional Service Providers
Registered Dietitian133V00000XLicense 984417
Dietary & Nutritional Service Providers

Profile Score

Detailed profile(82/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
10 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
4 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1111 Ne 99th Ave

Portland, OR 97220-9428

Phone: (503) 963-2707

Fax: (503) 963-2802

Street-level locationGet directions

More OR providers

Mailing address

847 Ne 19th Ave Ste 300

Portland, OR 97232-2686

Additional practice locations (3)

1508 Division St Ste 15
Oregon City, OR 97045-1583
Phone: (503) 692-3750
Fax: (503) 691-2324
9701 Sw Barnes Rd Ste 300
Portland, OR 97225-6689
Phone: (503) 297-8081
Fax: (503) 292-6601
19250 Sw 90th Ave
Tualatin, OR 97062-7585
Phone: (503) 692-3750
Fax: (503) 691-2324

Enumerated: 2015-12-07
Last updated: 2022-07-21

Frequently asked questions

What is Alyssa O'Brien's NPI number?: Alyssa O'Brien's National Provider Identifier (NPI) is 1023483799, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Alyssa O'Brien's specialty?: Alyssa O'Brien is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
Where is Alyssa O'Brien located?: Alyssa O'Brien's practice location on file with NPPES is 1111 Ne 99th Ave, Portland, OR 97220-9428.
What is Alyssa O'Brien's phone number?: The practice phone number listed in the NPPES registry for Alyssa O'Brien is (503) 963-2707.
Does Alyssa O'Brien accept Medicare?: Alyssa O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Alyssa O'Brien's NPI active?: Yes — Alyssa O'Brien's NPI (1023483799) is active in the NPPES registry as of the last update on 2022-07-21.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.