MONICA NGUYEN O.D.
NPI 1356959258
Optometrist in San Leandro, CA
About Monica Nguyen O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MONICA NGUYEN O.D. (NPI 1356959258) is an individual optometrist in San Leandro, California, licensed in California (34630) and active in the NPI registry since July 2020. She is enrolled in Medicare PECOS, maintains a secondary practice location in Sunnyvale, and is a graduate of University Of California - School Of Optometry (2020).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Monica Nguyen O.d. 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.
Medicare Billing Reassignments
3Medicare enrollment records show Monica Nguyen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Leandro, CA 94577
- Reassigned Medicare billing, California enrollment
- 28 clinicians in this Medicare group
San Leandro, CA 94577
- Reassigned Medicare billing, California enrollment
- 5 clinicians in this Medicare group
Sunnyvale, CA 94086
- 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 94577 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 4
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 Monica Nguyen's NPI number?
The NPI number for Monica Nguyen is 1356959258. It was assigned to this individual provider in the NPPES registry on July 16, 2020.
Where is Monica Nguyen located?
Monica Nguyen practices at 157 Parrott St, San Leandro, CA 94577. The listed phone number is (510) 488-4770.
What is Monica Nguyen's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Monica Nguyen enrolled in Medicare?
Yes. Monica 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.
Which organizations bill Medicare for Monica Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Monica Nguyen reassigns Medicare benefits to 3 organizations: Through The Hayes Optometry Inc (San Leandro, CA), Rosalia Saavedra,od A Professional Corporation (San Leandro, CA) and Dr. Gary Gold & Associates Optometry (Sunnyvale, 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 Monica Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Monica 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 Monica 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 Monica Nguyen was last updated on January 28, 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.
# Monica Nguyen, O.D. · NPI 1356959258
Optometrist provider in San Leandro, California. Individual provider, active in the CMS NPPES registry since July 16, 2020.
## Identity
- **NPI:** 1356959258 (Entity type: Individual)
- **Enumerated:** July 16, 2020
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 34630 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 157 PARROTT ST, San Leandro, CA 94577-4813
- **Phone:** (510) 488-4770
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Through The Hayes Optometry Inc (NPI 1144111758, San Leandro, CA); Rosalia Saavedra,od A Professional Corporation (NPI 1225495922, San Leandro, CA); Dr. Gary Gold & Associates Optometry (NPI 1598936585, Sunnyvale, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California - School Of Optometry, class of 2020
## Record status
- **NPPES last updated:** January 28, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1356959258) · Data from the CMS NPPES public registry.