DR. LILY THUY NGUYEN OD
NPI 1518522747
Optometrist in Pleasanton, CA
About Dr. Lily Thuy Nguyen Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LILY THUY NGUYEN OD (NPI 1518522747) is an individual optometrist in Pleasanton, California, licensed in California (OPT34245-TLG) and active in the NPI registry since May 2019. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Southern California College Of Optometry (2019).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Dr. Lily Thuy Nguyen Od 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 Reassignment
Medicare enrollment records show Lily Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92128
- Reassigned Medicare billing, California enrollment
- 236 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94588 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PLEASANTON, CA 94588
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 Lily Nguyen's NPI number?
The NPI number for Lily Nguyen is 1518522747. It was assigned to this individual provider in the NPPES registry on May 2, 2019.
Where is Lily Nguyen located?
Lily Nguyen practices at 4480 Willow Rd, Pleasanton, CA 94588. The listed phone number is (510) 498-2857.
What is Lily Nguyen's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Lily Nguyen enrolled in Medicare?
Yes. Lily 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 organization bills Medicare for Lily Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lily Nguyen reassigns Medicare benefits to Total Vision PC (San Diego, 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 Lily Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lily Nguyen accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of Wyoming, Blue Cross and Blue Shield of Louisiana, Blue Cross and Blue Shield of Montana and Blue Cross and Blue Shield of Oklahoma and 2 other insurers list Lily 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 Lily Nguyen was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 days 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.
# Dr. Lily Thuy Nguyen, OD · NPI 1518522747
Optometrist provider in Pleasanton, California. Individual provider, active in the CMS NPPES registry since May 2, 2019.
## Identity
- **NPI:** 1518522747 (Entity type: Individual)
- **Enumerated:** May 2, 2019
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** OPT34245-TLG (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4480 WILLOW RD, Pleasanton, CA 94588-8519
- **Phone:** (510) 498-2857
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Total Vision PC (NPI 1356813711, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern California College Of Optometry, class of 2019
## Record status
- **NPPES last updated:** October 9, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1518522747) · Data from the CMS NPPES public registry.