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

OLIVIA NGUYEN
NPI 1902478779
Family Medicine - Addiction Medicine in Santa Barbara, CA

Q: What is Olivia Nguyen's NPI number?

The NPI number for Olivia Nguyen is 1902478779. It was assigned to this individual provider in the NPPES registry on July 12, 2021.

Q: What is Olivia Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.

Q: When was this NPI record last updated?

The NPPES record for Olivia Nguyen was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.

Active since July 12, 2021PECOS EnrolledAccepts Medicare Assignment

2320 BATH ST STE 201, SANTA BARBARA, CA 93105(805) 324-8336(805) 324-5174 Get Directions Write a Review

NPPES record last updated: October 9, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 9, 2026, Jun 23, 2025, Sep 25, 2024 and 1 more (4 updates tracked since 2021).

On this page

About Olivia Nguyen NPPES

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

OLIVIA NGUYEN (NPI 1902478779) is an individual addiction medicine provider in Santa Barbara, California, licensed in California (A196357) and active in the NPI registry since July 2021. She is enrolled in Medicare PECOS, maintains 8 additional practice locations, and is a graduate of University Of Texas Southwestern Medical School At Dallas (2021).

NPPES Registry Identity

NPI1902478779

Entity TypeIndividualFemale

Primary Taxonomy207QA0401X

Provider Legal NameOLIVIA NGUYEN

Location Address2320 BATH ST STE 201Santa Barbara, CA 93105-4344

Mailing Address414 E Cota StSanta Barbara, CA 93101-1624 · (805) 324-8336 · Fax (805) 324-5174

Phone(805) 324-8336

Fax(805) 324-5174

Sole ProprietorYes

Medical School CMSUniversity Of Texas Southwestern Medical School At DallasGraduated 2021

Enumeration DateJuly 12, 2021

Last NPPES UpdateOctober 9, 20264 updates tracked since enumeration

NPPES CertifiedOctober 9, 2026

✔ NPI 1902478779 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Addiction MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207QA0401X

License✔ Licensed in CA · A196357

Definition

A family medicine physician who specializes in the diagnosis and treatment of addictions.

2320 BATH ST STE 201, Santa Barbara, CA 93105

Open in Google Maps ↗

Secondary Practice Locations 8

Location 1300 Hillmont Ave Ste 101Ventura, CA 93003-1651 · Phone (805) 652-6100

Location 2300 Hillmont AveVentura, CA 93003-1651 · Phone (805) 652-6000

Location 3300 Hillmont Ave Bldg 340Ventura, CA 93003-1651 · Phone (805) 652-6228

Location 43147 Loma Vista RdVentura, CA 93003-2917 · Phone (805) 652-6694

Location 5300 Hillmont Ave Ste 201Ventura, CA 93003-1651 · Phone (805) 652-6100

Location 6200 Hillmont AveVentura, CA 93003-1647 · Phone (805) 652-6729

Location 75580 Calle RealGoleta, CA 93111-1646 · Phone (805) 617-7878 · Fax (805) 618-3157

Location 82150 N Victoria AveOxnard, CA 93036-7791 · Phone (805) 382-6296

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Olivia Nguyen is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4385174549

PECOS Enrollment IDI20250204001484

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Olivia Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Ventura

26 mi

Federally Qualified Health Center (FQHC)

133 W. SANTA CLARA
Ventura, CA 93001

Reassigned Medicare billing, California enrollment
710 clinicians in this Medicare group

NPI 1780821660 (805) 641-5600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$139.99 typical visit price

range $62.01 – $184.40

Typical copayment $34.99 (range $15.50 – $46.10)

Most-billed visit code 99204

Established Patient

$108.26 typical visit price

range $20.60 – $151.20

Typical copayment $27.06 (range $5.15 – $37.80)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

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

LAUREN RENEE SUGAR NP

Nurse Practitioner (Psychiatric/Mental Health)

2320 BATH ST STE 201
SANTA BARBARA, CA 93105

Santa Barbara County (805) 324-8336

SANTA BARBARA NEIGHBORHOOD CLINICS

Clinic/Center (Federally Qualified Health Center (FQHC))

2320 BATH ST STE 201
SANTA BARBARA, CA 93105

Santa Barbara County (805) 617-7858

JULIA VICTORIA SOLEMAR

Family Medicine

2320 BATH ST STE 201
SANTA BARBARA, CA 93105

Santa Barbara County (805) 324-8336

DAVID GUERRERO ASW

Social Worker

2320 BATH ST STE 201
SANTA BARBARA, CA 93105

Santa Barbara County (805) 324-8336

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 Olivia Nguyen's NPI number?

The NPI number for Olivia Nguyen is 1902478779. It was assigned to this individual provider in the NPPES registry on July 12, 2021.

Where is Olivia Nguyen located?

Olivia Nguyen practices at 2320 Bath St Ste 201, Santa Barbara, CA 93105. The listed phone number is (805) 324-8336.

What is Olivia Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.

Is Olivia Nguyen enrolled in Medicare?

Yes. Olivia Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Olivia Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olivia Nguyen reassigns Medicare benefits to County Of Ventura (Ventura, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Olivia Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Olivia Nguyen was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.