What is Olivia Nguyen's NPI number?

Olivia Nguyen's National Provider Identifier (NPI) is 1902478779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Olivia Nguyen's specialty?

Olivia Nguyen is listed in the NPPES registry with a primary specialty of Addiction Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).

Where is Olivia Nguyen located?

Olivia Nguyen's practice location on file with NPPES is 300 Hillmont Ave, Ventura, CA 93003-1651.

What is Olivia Nguyen's phone number?

The practice phone number listed in the NPPES registry for Olivia Nguyen is (805) 652-6000.

Does Olivia Nguyen accept Medicare?

Olivia Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Olivia Nguyen's NPI active?

Yes — Olivia Nguyen's NPI (1902478779) is active in the NPPES registry as of the last update on 2025-06-23.

IndividualActiveAccepts Medicare

Olivia Nguyen

NPI 1902478779 · Addiction Medicine (Family Medicine) Physician · Ventura, CA

Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Olivia Nguyen is a Addiction Medicine (Family Medicine) Physician provider in Ventura, CA (NPI 1902478779).

Provider details

NPI number: 1902478779
Entity type: Individual
Primary specialty: Addiction Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
Sex: Female
Sole proprietor: Yes
License: A196357 (CA)

Specialties & taxonomies

Addiction Medicine (Family Medicine) PhysicianPrimary207QA0401XLicense A196357 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(75/100 index)

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

Registry tenure33% of score
4 yrs in NPPES registry
Profile completeness33% of score
100% of core fields populated
Practice footprint20% of score
7 documented practice locations
Open Payments transparency13% of score
Has Open Payments disclosures (2024)

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.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Atorvastatin Calcium	25	11
Semaglutidebrand: Ozempic	14	—
Losartan Potassium	12	—
Metformin Hclbrand: Metformin Hcl Er	11	—

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$109 across 5 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Practice location

300 Hillmont Ave

Ventura, CA 93003-1651

Phone: (805) 652-6000

Street-level locationGet directions

More CA providers

Mailing address

300 Hillmont Ave Bldg 340