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TAMMY NGUYEN OD
NPI 1396864575
Optometrist in San Mateo, CA

Active since March 28, 2007PECOS EnrolledAccepts Medicare Assignment
80/100
CMS Quality Rating
50 S SAN MATEO DR, SUITE 200, SAN MATEO, CA 94401(650) 342-4595 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Tammy Nguyen Od NPPES

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

TAMMY NGUYEN OD (NPI 1396864575) is an individual optometrist in San Mateo, California, licensed in California (OPT 11827 TPA) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2000).

NPPES Registry Identity

NPI1396864575
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameTAMMY NGUYENCredential: OD
Location Address50 S SAN MATEO DR, SUITE 200San Mateo, CA 94401-3857
Mailing Address50 S San Mateo Dr, Suite 200San Mateo, CA 94401-3857
Phone(650) 342-4595
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateMarch 28, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1396864575 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · OPT 11827 TPA
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
50 S SAN MATEO DR, San Mateo, CA 94401
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Tammy Nguyen Od 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 ID6305006180
PECOS Enrollment IDI20120402000567
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94401 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality100
Promoting Interoperability100
Improvement Activities40
Cost33.35

Other Providers at the Same Location NPPES 20

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

SOMYA JALAN MD
Pediatrics
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8353
DR. STEPHEN BUCHNER MD
Pediatrics
50 S SAN MATEO DR, STE 180
SAN MATEO, CA 94401
San Mateo County (650) 342-4145
DR. GEORGE WILLIAM SHORAGO M.D.
Otolaryngology
50 S SAN MATEO DR, SUITE 320
SAN MATEO, CA 94401
San Mateo County (650) 340-7200
JULIAN HARDY MCLAIN MD
Internal Medicine (Hematology & Oncology)
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 696-5420
HOWARD K CHOW MD
Pediatrics
50 S SAN MATEO DR, SUITE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DENISE MARY ROS
Physician Assistant
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8788
JEANNE V BEYMER MD
Pediatrics
50 S SAN MATEO DR, STE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DR. JOHN ROBERT GRIFFIN M.D.
Surgery (Plastic and Reconstructive Surgery)
50 S SAN MATEO DR, STE 470
SAN MATEO, CA 94401
San Mateo County (650) 652-8239

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 Tammy Nguyen's NPI number?

The NPI number for Tammy Nguyen is 1396864575. It was assigned to this individual provider in the NPPES registry on March 28, 2007.

Where is Tammy Nguyen located?

Tammy Nguyen practices at 50 S San Mateo Dr Suite 200, San Mateo, CA 94401. The listed phone number is (650) 342-4595.

What is Tammy Nguyen's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Tammy Nguyen enrolled in Medicare?

Yes. Tammy 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.

What insurance does Tammy Nguyen accept?

Health plans from Ambetter from Arizona Complete Health and Providence Health Plan list Tammy Nguyen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Tammy 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.