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DR. TIMOTHY THOAI NGUYEN D.D.S.
NPI 1003019365
Dentist - Oral and Maxillofacial Surgery in Milpitas, CA

Active since June 06, 2007Opted out of Medicare · through Sep 30, 2027
991 MONTAGUE EXPY STE 102, MILPITAS, CA 95035(408) 946-6666(408) 935-8805 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Timothy Thoai Nguyen D.d.s. NPPES

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

DR. TIMOTHY THOAI NGUYEN D.D.S. (NPI 1003019365) is an individual oral and maxillofacial surgery provider in Milpitas, California, licensed in California (40381) and active in the NPI registry since June 2007. He has opted out of Medicare through September 30, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1003019365
Entity TypeIndividualMale
Primary Taxonomy1223S0112X
Provider Legal NameDR. TIMOTHY THOAI NGUYENCredential: D.D.S.
Location Address991 MONTAGUE EXPY STE 102Milpitas, CA 95035-6818
Mailing Address991 Montague Expy Ste 102Milpitas, CA 95035-6818 · (408) 946-6666 · Fax (408) 935-8805
Phone(408) 946-6666
Fax(408) 935-8805
Sole ProprietorYes
Enumeration DateJune 6, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1003019365 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers
Taxonomy Code1223S0112X
License✔ Licensed in CA · 40381
Definition
An oral and maxillofacial surgery dentist specialized in the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region.
991 MONTAGUE EXPY STE 102, Milpitas, CA 95035
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Timothy Thoai Nguyen D.d.s. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 30, 2025 through September 30, 2027.

Opt-Out Effective DateSeptember 30, 2025
Opt-Out In Effect ThroughSeptember 30, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95035 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
$106.47 typical visit price
range $70.37 – $206.04
Typical copayment $26.61 (range $17.59 – $51.51)
Most-billed visit code 99203
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Patient Reviews User submitted

Reviews are submitted by site visitors and approved by a human moderator before publication.

Review by Juanita ***** July 30, 2025

5/5
Dr Nguyen did a fantastic job with my oral extraction. He's clear precise and very professional and his staff, while amiable and helpful, are also very professional. The facility is clean and quiet and very presentable. Thanks to Dr Nguyen's skills I felt little to no discomfort after the procedure and was able to walk away with very little side effects from the anesthesia.
Provider 4/5 Office Staff 5/5
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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 Timothy Nguyen's NPI number?

The NPI number for Timothy Nguyen is 1003019365. It was assigned to this individual provider in the NPPES registry on June 6, 2007.

Where is Timothy Nguyen located?

Timothy Nguyen practices at 991 Montague Expy Ste 102, Milpitas, CA 95035. The listed phone number is (408) 946-6666.

What is Timothy Nguyen's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Is Timothy Nguyen enrolled in Medicare?

No. Timothy Nguyen has opted out of Medicare through September 30, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Timothy Nguyen was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.