THERESA NGUYEN OD
NPI 1609555713
Optometrist in Chula Vista, CA
About Theresa Nguyen Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA NGUYEN OD (NPI 1609555713) is an individual optometrist in Chula Vista, California, licensed in California (35530) and active in the NPI registry since July 2023. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Theresa Nguyen Od is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Theresa Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chula Vista, CA 91915
- Reassigned Medicare billing, California enrollment
- 17 clinicians in this Medicare group
Poway, CA 92064
- Reassigned Medicare billing, California enrollment
- 14 clinicians in this Medicare group
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 91915 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Theresa Nguyen's NPI number?
The NPI number for Theresa Nguyen is 1609555713. It was assigned to this individual provider in the NPPES registry on July 17, 2023.
Where is Theresa Nguyen located?
Theresa Nguyen practices at 1741 Eastlake Pkwy Ste 101, Chula Vista, CA 91915. The listed phone number is (619) 421-6600.
What is Theresa Nguyen's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Theresa Nguyen enrolled in Medicare?
Yes. Theresa Nguyen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Theresa Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Nguyen reassigns Medicare benefits to 2 organizations: Keddington & Kalra Optometrists Apc (Chula Vista, CA) and Michelle King Od Inc A Professional Corporation (Poway, 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 Theresa Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Nguyen accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Theresa 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 Theresa Nguyen was last updated on August 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Theresa Nguyen, OD · NPI 1609555713
Optometrist provider in Chula Vista, California. Individual provider, active in the CMS NPPES registry since July 17, 2023.
## Identity
- **NPI:** 1609555713 (Entity type: Individual)
- **Enumerated:** July 17, 2023
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 35530 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1741 EASTLAKE PKWY STE 101, Chula Vista, CA 91915-2032
- **Phone:** (619) 421-6600
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Keddington & Kalra Optometrists Apc (NPI 1376793828, Chula Vista, CA); Michelle King Od Inc A Professional Corporation (NPI 1609180603, Poway, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 31, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1609555713) · Data from the CMS NPPES public registry.