DR. PHONG T NGUYEN MD
NPI 1346268778
Family Medicine in Winchester, CA

Q: What is Phong Nguyen's NPI number?

The NPI number for Phong Nguyen is 1346268778. It was assigned to this individual provider in the NPPES registry on July 17, 2006.

Q: What is Phong Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Phong Nguyen was last updated on December 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since July 17, 2006PECOS Enrolled

31895 OPAL DR, WINCHESTER, CA 92596(858) 472-1800 Get Directions Write a Review

NPPES record last updated: December 16, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Phong T Nguyen Md NPPES

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

DR. PHONG T NGUYEN MD (NPI 1346268778) is an individual family medicine provider in Winchester, California, licensed in California (A95447) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346268778

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. PHONG T NGUYENCredential: MD

Location Address31895 OPAL DRWinchester, CA 92596-9081

Mailing Address31895 Opal DrWinchester, CA 92596-9081 · (858) 472-1800

Phone(858) 472-1800

Sole ProprietorNo

Enumeration DateJuly 17, 2006

Last NPPES UpdateDecember 16, 2021

✔ NPI 1346268778 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A95447

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

31895 OPAL DR, Winchester, CA 92596

Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Phong T Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Phong Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc

377 mi

Internal Medicine

710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1073606299 (408) 851-1000

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 92596 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

$91.88 typical visit price

range $59.60 – $179.42

Typical copayment $22.97 (range $14.90 – $44.85)

Most-billed visit code 99203

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

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.

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 Phong Nguyen's NPI number?

The NPI number for Phong Nguyen is 1346268778. It was assigned to this individual provider in the NPPES registry on July 17, 2006.

Where is Phong Nguyen located?

Phong Nguyen practices at 31895 Opal Dr, Winchester, CA 92596. The listed phone number is (858) 472-1800.

What is Phong Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Phong Nguyen enrolled in Medicare?

Yes. Phong Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Phong Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Phong Nguyen reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, 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 Phong 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 Phong Nguyen was last updated on December 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.