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DR. VIET HOANG NGUYEN D.O.
NPI 1770528515
Internal Medicine in Irvine, CA

Active since June 17, 2006PECOS Enrolled
11 TECHNOLOGY DR, IRVINE, CA 92618(855) 206-6764(949) 923-3575 Get Directions Write a Review

NPPES record last updated: November 23, 2016. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 23, 2016, Dec 14, 2015 (2 updates tracked since 2015).

About Dr. Viet Hoang Nguyen D.o. NPPES

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

DR. VIET HOANG NGUYEN D.O. (NPI 1770528515) is an individual internal medicine provider in Irvine, California, licensed in California (20A9011) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1770528515
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. VIET HOANG NGUYENCredential: D.O.
Location Address11 TECHNOLOGY DRIrvine, CA 92618-2302
Mailing Address11 Technology DrIrvine, CA 92618-2302 · (855) 206-6764 · Fax (949) 923-3575
Phone(855) 206-6764
Fax(949) 923-3575
Sole ProprietorNo
Enumeration DateJune 17, 2006
Last NPPES UpdateNovember 23, 20162 updates tracked since enumeration
✔ NPI 1770528515 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · 20A9011
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 20A9011 (CA)
11 TECHNOLOGY DR, Irvine, CA 92618
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Other Identifiers 1

Medicare PINCB221881CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Viet Hoang Nguyen D.o. 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 Reassignments

2

Medicare enrollment records show Viet Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Healthcare Partners Affiliates Medical Group
7.4 mi
Addiction Medicine
14591 NEWPORT AVE
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1891981502 (714) 442-4864
Centers For Family Medicine Gp
22 mi
Family Medicine
3460 KATELLA AVE
Los Alamitos, CA 90720
  • Reassigned Medicare billing, California enrollment
  • 228 clinicians in this Medicare group
NPI 1467598243 (562) 594-6599

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 92618 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 20

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

DR. MARIA TERESA CORPIN AGNER MD
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (855) 206-6764
DR. SHAHNOOS MAHDAVI M.D.
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (855) 206-6764
DR. JUSTIN D HARRIS M.D.
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (949) 923-3200
DR. SUBRATO GHOSH MD
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (855) 206-6764
DR. PARAG SHARMA M.D.
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (855) 206-6764
DR. HAI XUAN LE M.D.
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (949) 923-3200
DR. MOLOOD HADI DO
Internal Medicine
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (949) 923-3200
DR. ALI AHOUI MD
Hospitalist
11 TECHNOLOGY DR
IRVINE, CA 92618
Orange County (855) 206-6764

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 Viet Nguyen's NPI number?

The NPI number for Viet Nguyen is 1770528515. It was assigned to this individual provider in the NPPES registry on June 17, 2006.

Where is Viet Nguyen located?

Viet Nguyen practices at 11 Technology Dr, Irvine, CA 92618. The listed phone number is (855) 206-6764.

What is Viet Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Viet Nguyen enrolled in Medicare?

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

Which organizations bill Medicare for Viet Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Viet Nguyen reassigns Medicare benefits to 2 organizations: Healthcare Partners Affiliates Medical Group (Tustin, CA) and Centers For Family Medicine Gp (Los Alamitos, CA). Each 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 Viet 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 Viet Nguyen was last updated on November 23, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.