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DIANA NGUYEN OPTOMETRY INC
NPI 1225266463
Optometrist in Santa Ana, CA

Active since June 25, 2009
903 S BRISTOL ST STE A, SANTA ANA, CA 92703(714) 564-9696(714) 784-7891 Get Directions Write a Review

NPPES record last updated: March 19, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Diana Nguyen Optometry Inc NPPES

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

DIANA NGUYEN OPTOMETRY INC (NPI 1225266463) is a healthcare organization registered as an optometrist in Santa Ana, California and active in the NPI registry since June 2009. The organization lists Diana Nguyen, President, as its authorized official.

NPPES Registry Identity

NPI1225266463
Entity TypeOrganization
Primary Taxonomy152W00000X
Legal Business NameDIANA NGUYEN OPTOMETRY INC
Location Address903 S BRISTOL ST STE ASanta Ana, CA 92703-4983
Mailing Address903 S Bristol St Ste ASanta Ana, CA 92703-4983 · (714) 564-9696 · Fax (714) 784-7891
Phone(714) 564-9696
Fax(714) 784-7891
Organization SubpartNo
Authorized OfficialDiana NguyenPresident · (714) 200-4261
Enumeration DateJune 25, 2009
Last NPPES UpdateMarch 19, 2012
✔ NPI 1225266463 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 12457 TPL
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.
903 S BRISTOL ST STE A, Santa Ana, CA 92703
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Other Identifiers 3

OtherFP987ACA · Medicare Ptan
Medicare UPINU99317CA
Medicare PINFP987ACA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Louisiana, Blue Cross Blue Shield of Wyoming.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diana Nguyen Optometry Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateCaliforniaEnrollment IDO20111214000552Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Diana Nguyen Optometry Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Diana Nguyen, O. D.
Optometry
NPI 1649499229
903 S. BRISTOL ST. UNIT A
Santa Ana, CA 92703
(714) 200-4261
✔ PECOSSame address

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

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 Diana Nguyen Optometry Inc's NPI number?

The NPI number for Diana Nguyen Optometry Inc is 1225266463. It was assigned to this organization in the NPPES registry on June 25, 2009.

Where is Diana Nguyen Optometry Inc located?

Diana Nguyen Optometry Inc is located at 903 S Bristol St Ste A, Santa Ana, CA 92703. The listed phone number is (714) 564-9696.

What is Diana Nguyen Optometry Inc's specialty?

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

Is Diana Nguyen Optometry Inc enrolled in Medicare?

Yes. Diana Nguyen Optometry Inc is registered in the Medicare PECOS enrollment system.

When is Diana Nguyen Optometry Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Diana Nguyen Optometry Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Optometry) reassigns their Medicare billing to Diana Nguyen Optometry Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Diana Nguyen Optometry Inc accept?

Health plans from Blue Cross Blue Shield of Wyoming and Blue Cross and Blue Shield of Louisiana list Diana Nguyen Optometry Inc 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 Diana Nguyen Optometry Inc was last updated on March 19, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.